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1. Dvije matrice: sabiranje,oduzimanje,mnozenje,dijeljenje,transponovanje,inverzna.

% Size changed function: UlaznipodaciPanel

function UlaznipodaciPanelSizeChanged(app, event)

position = app.UlaznipodaciPanel.Position;

end

% Value changed function: ElementiprvematriceTextArea

function ElementiprvematriceTextAreaValueChanged(app, event)

value = app.ElementiprvematriceTextArea.Value;

end

% Button pushed function: IspisirezultateButton

function IspisirezultateButtonPushed(app, event)

mat1 = str2num(char(app.ElementiprvematriceTextArea.Value));

mat2 = str2num(char(app.ElementidrugematriceTextArea.Value));

%prikaz matrica

app.PrvamatricaTextArea.Value = mat2str(mat1);

app.DrugamatricaTextArea.Value = mat2str(mat2);

% Racunanje i prikaz inverznih matrica

if det(mat1) ~= 0

app.InverznamatricaTextArea.Value = mat2str(inv(mat1));

else

app.InverznamatricaTextArea.Value = 'N/A';

end

if det(mat2) ~= 0

app.InverznamatricaTextArea_2.Value = mat2str(inv(mat2));

else

app.InverznamatricaTextArea_2.Value = 'N/A';

end

% Prikaz transponovanih matrica

app.TransponovanamatricaTextArea.Value = mat2str(mat1');

app.TransponovanamatricaTextArea_2.Value = mat2str(mat2');

% Operacije sa matricama

if isequal(size(mat1), size(mat2))

app.ZbirmatricaTextArea.Value = mat2str(mat1 + mat2);

app.RazlikamatricaTextArea.Value = mat2str(mat1 - mat2);

else

app.ZbirmatricaTextArea.Value = 'N/A';

app.RazlikamatricaTextArea.Value = 'N/A';

end

if size(mat1, 2) == size(mat2, 1)

app.ProizvodmatricaTextArea.Value = mat2str(mat1 * mat2);

else

app.ProizvodmatricaTextArea.Value = 'N/A';

end

end

end

2. Jedna matrica: dijagonalna,inverzna,gornjat i donjat

% Button pushed function: DijagonalnaMatricaButton

function DijagonalnaMatricaButtonPushed(app, event)

matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char

matrix = str2num(matrixStr); % Convert char to numerical array

if isempty(matrix)

app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';

return;

end

diag_matrix = diag(diag(matrix));

app.IspisrezultataTextArea.Value = mat2str(diag_matrix);

end

% Button pushed function: InverznaButton

function InverznaButtonPushed(app, event)

matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char

matrix = str2num(matrixStr); % Convert char to numerical array

if isempty(matrix)

app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';

return;

end

if det(matrix) == 0

app.IspisrezultataTextArea.Value = 'Matrica nema inverznu!';

return;

end

inv_matrix = inv(matrix);

app.IspisrezultataTextArea.Value = mat2str(inv_matrix);

end

% Button pushed function: GornjetrougaonaButton

function GornjetrougaonaButtonPushed(app, event)

matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char

matrix = str2num(matrixStr); % Convert char to numerical array

if isempty(matrix)

app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';

return;

end

upper_tri = triu(matrix);

app.IspisrezultataTextArea.Value = mat2str(upper_tri);

end

% Button pushed function: DonjetrougaonaButton

function DonjetrougaonaButtonPushed(app, event)

matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char

matrix = str2num(matrixStr); % Convert char to numerical array

if isempty(matrix)

app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';

return;

end

lower_tri = tril(matrix);

app.IspisrezultataTextArea.Value = mat2str(lower_tri);

end

end

3. Sve o recenicama

% Button pushed function: StartButton

function StartButtonPushed(app, event)

% Get input text

text = app.InputTextArea.Value;

text = string(text);

% Count words

words = strsplit(text);

numWords = length(words);

% Count exclamation sentences

numExclSentences = numel(strfind(text, '!'));

numPeriodSentences = numel(strfind(text, '.'));

numQuestionSentences = numel(strfind(text, '?'));

numSentences = numExclSentences + numPeriodSentences + numQuestionSentences;

% Count vowels

textlower = lower(text);

numa = numel(strfind(textlower, 'a'));

nume = numel(strfind(textlower, 'e'));

numi = numel(strfind(textlower, 'i'));

numo = numel(strfind(textlower, 'o'));

numu = numel(strfind(textlower, 'u'));

numVowels = numa+nume+numi+numo+numu;

% Count non-vowels

numNonVowels = sum(isletter(text)) - numVowels; % Count all letters minus vowels

% Update fields

app.WordsEditField.Value = num2str(numWords);

app.SentencesEditField.Value = num2str(numSentences);

app.ExclSentencesEditField.Value = num2str(numExclSentences);

app.PeriodSentencesEditField.Value = num2str(numPeriodSentences);

app.QuestionSentencesEditField.Value = num2str(numQuestionSentences);

app.VowelsEditField.Value = num2str(numVowels);

app.NonVowelsEditField.Value = num2str(numNonVowels);

end

% Button pushed function: DeleteButton

function DeleteButtonPushed(app, event)

app.InputTextArea.Value = '';

% Clear the results fields

app.WordsEditField.Value = num2str(0);

app.SentencesEditField.Value = num2str(0);

app.ExclSentencesEditField.Value =num2str(0);

app.PeriodSentencesEditField.Value =num2str(0);

app.QuestionSentencesEditField.Value = num2str(0);

app.VowelsEditField.Value = num2str(0);

app.NonVowelsEditField.Value = num2str(0);

end

end

4. Spajanje rijeci,slova,suglasnici..

% Button pushed function: SpajanjeRijeciButton

function SpajanjeRijeciButtonPushed(app, event)

% Uzmi tekst iz EditField

sentence = app.EditField.Value;

% Razdvoji riječi po razmacima (ili drugim separatorima ako su uneseni)

words = strsplit(sentence); % Razdvaja riječi po razmacima

mergedSentence = strjoin(words, ''); % Spaja riječi razmakom

% Postavi spojeni tekst u ResultTextArea

app.ResultTextArea.Value = mergedSentence;

end

% Button pushed function: SlovaiSuglasniciButton

function SlovaiSuglasniciButtonPushed(app, event)

sentence = app.EditField.Value;

vowels = 'aeiouAEIOU';

numVowels = sum(ismember(sentence, vowels));

numNonVowels = sum(~ismember(sentence, vowels) & isletter(sentence));

app.ResultTextArea.Value = sprintf('Broj slova: %d\nBroj suglasnika: %d\n', numVowels + numNonVowels, numNonVowels);

end

% Button pushed function:

% BrojRecenicaBrojRijeciBrojSuglasnikaButton

function BrojRecenicaBrojRijeciBrojSuglasnikaButtonPushed(app, event)

sentence = app.EditField.Value;

words = strsplit(sentence);

result = '';

vowels = 'aeiouAEIOU';

for i = 1:length(words)

word = words{i};

numVowels = sum(ismember(word, vowels));

result = [result, sprintf('Riječ: %s\n Broj slova: %d\n Broj samoglasnika: %d\n Samoglasnici: %s\n', ...

word, length(word), numVowels, word(ismember(word, vowels)))];

end

app.ResultTextArea.Value = result;

end

end

5. Funckija sa omegom

% Button pushed function: PrikaziButton

function PrikaziButtonPushed(app, event)

% Get parameter values from GUI

T = app.TEditField.Value;

omega = app.OmegaEditField.Value;

phi = app.PhiEditField.Value;

t_min = app.TminEditField.Value;

t_max = app.TmaxEditField.Value;

% Generate time vector

t = linspace(t_min, t_max, 100);

% Calculate function f(t)

f = exp(-t/T) .* sin(omega*t + phi);

% Plot the function

plot(app.UIAxes, t, f);

xlabel(app.UIAxes, 't');

ylabel(app.UIAxes, 'f(t)');

title(app.UIAxes, 'Prikaz funkcije');

end

end

6. Smajlic

% Button pushed function: SretniButton

function SretniButtonPushed(app, event)

% Kreiranje koordinata za smajlića

t = 0:pi/50:2*pi;

x_head = 4 * cos(t);

y_head = 4 * sin(t);

x_eye1 = cos(t) - 2;

y_eye1 = sin(t) + 1.5;

x_eye2 = cos(t) + 2;

y_eye2 = sin(t) + 1.5;

t_mouth = pi:pi/50:2*pi;

x_mouth = 3 * cos(t_mouth);

y_mouth = 3 * sin(t_mouth);

% Prikazivanje smajlića na UIAxes komponenti

plot(app.UIAxes, x_head, y_head, 'LineWidth', 2, 'Color', 'yellow');

hold(app.UIAxes, 'on'); % Drži trenutni grafikon

plot(app.UIAxes, x_eye1, y_eye1, 'LineWidth', 2, 'Color', 'black');

plot(app.UIAxes, x_eye2, y_eye2, 'LineWidth', 2, 'Color', 'black');

plot(app.UIAxes, x_mouth, y_mouth, 'LineWidth', 2, 'Color', 'black');

hold(app.UIAxes, 'off'); % Završi držanje grafikona

end

% Button pushed function: TuzniButton

function TuzniButtonPushed(app, event)

% Kreiranje koordinata za tužnog smajlića

t = 0:pi/50:2*pi;

x = 4 * cos(t);

y = 4 * sin(t);

t1 = 0:pi/50:2*pi;

x1 = cos(t1) - 2;

y1 = sin(t1) + 1.5;

t2 = 0:pi/50:2*pi;

x2 = cos(t2) + 2;

y2 = sin(t2) + 1.5;

t3 = pi:pi/50:2*pi;

x3 = 3 * cos(t3);

y3 = -3 * sin(t3) - 2.3;

% Prikazivanje tužnog smajlića na UIAxes komponenti

plot(app.UIAxes, x, y, 'LineWidth', 2, 'Color', 'yellow');

hold(app.UIAxes, 'on'); % Drži trenutni grafikon

plot(app.UIAxes, x1, y1, 'LineWidth', 2, 'Color', 'black');

plot(app.UIAxes, x2, y2, 'LineWidth', 2, 'Color', 'black');

plot(app.UIAxes, x3, y3, 'LineWidth', 2, 'Color', 'black');

hold(app.UIAxes, 'off'); % Završi držanje grafikona

end

end

7. Zastava mijenja boju

% Button pushed function: PromijeniBojuButton

function PromijeniBojuButtonPushed(app, event)

% Clear previous plot

cla(app.UIAxes);

% Generate random color for the flag

color = rand(1, 3); % Random RGB color

% Generate data

t = 0:0.1:4*pi;

y1 = 1/2*sin(t) - 1;

y2 = 1/2*sin(t) + 1;

% Plot on UIAxes

hold(app.UIAxes, 'on');

area(app.UIAxes, t, y2, 'FaceColor', color, 'EdgeColor', color);

area(app.UIAxes, t, y1, 'FaceColor', color, 'EdgeColor', color);

hold(app.UIAxes, 'off');

% Set axes properties

xlabel(app.UIAxes, 'X osa');

ylabel(app.UIAxes, 'Y osa');

title(app.UIAxes, 'Grafikon na UI Axes');

axis(app.UIAxes, [-2 15 -2 2]); % Set axis limits

end

end

8. GUI sa matricom A, treba izaci B

% Button pushed function: IzracunajButton

function IzracunajButtonPushed(app, event)

A_str = app.ElementiMatriceATextArea.Value;

% Split the input string into lines

lines = splitlines(A_str);

% Initialize matrix A

A = [];

% Iterate through each line and convert to numbers

for i = 1:numel(lines)

line = strtrim(lines{i}); % Remove leading/trailing whitespace

if ~isempty(line)

row = str2double(strsplit(line)); % Convert line to numbers

A = [A; row]; % Append row to matrix A

end

end

% Check if A is empty or not a valid matrix

if isempty(A) || any(isnan(A(:)))

% Display error if input is not a valid matrix

app.OutputTextArea.Value = 'Error: Invalid matrix input.';

return;

end

% Calculate matrix B

% a) Exclude the last column of A

B_a = A(:, 1:end-1);

% b) Exclude the first row of A

B_b = A(2:end, :);

% c) Change signs of elements in the intersection of last row and first column

A(end, 1) = -A(end, 1);

B_c = A;

% Display matrix B in OutputTextArea

app.ElementiMatriceBTextArea.Value = sprintf(['B (iskljucenje zadnje kolone):\n%s\n\nB (iskljucenje prvog reda):\n%s\n\nB (presjek' ...

'):\n%s'], ...

mat2str(B_a), mat2str(B_b), mat2str(B_c));

end

end

9. Trostrana piramida:

% Button pushed function: PrikazipiramiduButton

function PrikazipiramiduButtonPushed(app, event)

height = app.VisinaPiramideEditField.Value;

baseLength = app.DuzinaOsnoviceEditField.Value;

% Calculate the vertices of the tetrahedron

A = [0, 0, 0];

B = [baseLength, 0, 0];

C = [baseLength/2, baseLength*sqrt(3)/2, 0];

D = [baseLength/2, baseLength*sqrt(3)/6, height];

% Define the faces of the tetrahedron

faces = [

1, 2, 3;

1, 3, 4;

1, 4, 2;

2, 3, 4

];

% Plot the tetrahedron

cla(app.UIAxes); % Clear previous plot

hold(app.UIAxes, 'on');

patch(app.UIAxes, 'Vertices', [A; B; C; D], 'Faces', faces, 'FaceColor', 'magenta', 'EdgeColor', 'k');

view(app.UIAxes, 3); % Set 3D view

axis(app.UIAxes, 'equal'); % Set equal axis scales

xlabel(app.UIAxes, 'X');

ylabel(app.UIAxes, 'Y');

zlabel(app.UIAxes, 'Z');

title(app.UIAxes, 'Tetrahedron');

hold(app.UIAxes, 'off');

end

end

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1. Dvije matrice: sabiranje,oduzimanje,mnozenje,dijeljenje,transponovanje,inverzna.
% Size changed function: UlaznipodaciPanel
        function UlaznipodaciPanelSizeChanged(app, event)
            position = app.UlaznipodaciPanel.Position;
            
        end

% Value changed function: ElementiprvematriceTextArea
        function ElementiprvematriceTextAreaValueChanged(app, event)
            value = app.ElementiprvematriceTextArea.Value;
            
        end

% Button pushed function: IspisirezultateButton
        function IspisirezultateButtonPushed(app, event)
            mat1 = str2num(char(app.ElementiprvematriceTextArea.Value));
            mat2 = str2num(char(app.ElementidrugematriceTextArea.Value));
            %prikaz matrica
            app.PrvamatricaTextArea.Value = mat2str(mat1);
            app.DrugamatricaTextArea.Value = mat2str(mat2);
             % Racunanje i prikaz inverznih matrica
            if det(mat1) ~= 0
                app.InverznamatricaTextArea.Value = mat2str(inv(mat1));
            else
                app.InverznamatricaTextArea.Value = 'N/A';
            end

if det(mat2) ~= 0
                app.InverznamatricaTextArea_2.Value = mat2str(inv(mat2));
            else
                app.InverznamatricaTextArea_2.Value = 'N/A';
            end
             % Prikaz transponovanih matrica
            app.TransponovanamatricaTextArea.Value = mat2str(mat1');
            app.TransponovanamatricaTextArea_2.Value = mat2str(mat2');
            % Operacije sa matricama
            if isequal(size(mat1), size(mat2))
                app.ZbirmatricaTextArea.Value = mat2str(mat1 + mat2);
                app.RazlikamatricaTextArea.Value = mat2str(mat1 - mat2);
            else
                app.ZbirmatricaTextArea.Value = 'N/A';
                app.RazlikamatricaTextArea.Value = 'N/A';
            end

if size(mat1, 2) == size(mat2, 1)
                app.ProizvodmatricaTextArea.Value = mat2str(mat1 * mat2);
            else
                app.ProizvodmatricaTextArea.Value = 'N/A';
            end

end
    end
    
    
 2. Jedna matrica: dijagonalna,inverzna,gornjat i donjat
% Button pushed function: DijagonalnaMatricaButton
        function DijagonalnaMatricaButtonPushed(app, event)
    matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char
    matrix = str2num(matrixStr); % Convert char to numerical array
    if isempty(matrix)
        app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';
        return;
    end
    diag_matrix = diag(diag(matrix));
    app.IspisrezultataTextArea.Value = mat2str(diag_matrix);
        end

% Button pushed function: InverznaButton
        function InverznaButtonPushed(app, event)
    matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char
    matrix = str2num(matrixStr); % Convert char to numerical array
    if isempty(matrix)
        app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';
        return;
    end
    if det(matrix) == 0
        app.IspisrezultataTextArea.Value = 'Matrica nema inverznu!';
        return;
    end
    inv_matrix = inv(matrix);
    app.IspisrezultataTextArea.Value = mat2str(inv_matrix);
        end

% Button pushed function: GornjetrougaonaButton
        function GornjetrougaonaButtonPushed(app, event)
    matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char
    matrix = str2num(matrixStr); % Convert char to numerical array
    if isempty(matrix)
        app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';
        return;
    end
    upper_tri = triu(matrix);
    app.IspisrezultataTextArea.Value = mat2str(upper_tri);

end

% Button pushed function: DonjetrougaonaButton
        function DonjetrougaonaButtonPushed(app, event)
    matrixStr = char(app.UnesielementematriceTextArea.Value); % Convert to char
    matrix = str2num(matrixStr); % Convert char to numerical array
    if isempty(matrix)
        app.IspisrezultataTextArea.Value = 'Unesite validnu matricu!';
        return;
    end
    lower_tri = tril(matrix);
    app.IspisrezultataTextArea.Value = mat2str(lower_tri);
        end
    end

3. Sve o recenicama
% Button pushed function: StartButton
        function StartButtonPushed(app, event)
              % Get input text
            text = app.InputTextArea.Value;
            text = string(text);
            % Count words
            
            words = strsplit(text);
            numWords = length(words);

% Count exclamation sentences
            numExclSentences = numel(strfind(text, '!'));
            numPeriodSentences = numel(strfind(text, '.'));
            numQuestionSentences = numel(strfind(text, '?'));
            numSentences = numExclSentences + numPeriodSentences + numQuestionSentences;
            % Count vowels
            textlower = lower(text);
            numa = numel(strfind(textlower, 'a'));
            nume = numel(strfind(textlower, 'e'));
            numi = numel(strfind(textlower, 'i'));
            numo = numel(strfind(textlower, 'o'));
            numu = numel(strfind(textlower, 'u'));

numVowels = numa+nume+numi+numo+numu;

% Count non-vowels
            numNonVowels = sum(isletter(text)) - numVowels;  % Count all letters minus vowels

% Update fields
            app.WordsEditField.Value = num2str(numWords);
            app.SentencesEditField.Value = num2str(numSentences);
            app.ExclSentencesEditField.Value = num2str(numExclSentences);
            app.PeriodSentencesEditField.Value = num2str(numPeriodSentences);
            app.QuestionSentencesEditField.Value = num2str(numQuestionSentences);
            app.VowelsEditField.Value = num2str(numVowels);
            app.NonVowelsEditField.Value = num2str(numNonVowels);

end

% Button pushed function: DeleteButton
        function DeleteButtonPushed(app, event)
            app.InputTextArea.Value = '';
            
            % Clear the results fields
            app.WordsEditField.Value = num2str(0);
            app.SentencesEditField.Value = num2str(0);
            app.ExclSentencesEditField.Value =num2str(0);
            app.PeriodSentencesEditField.Value =num2str(0);
            app.QuestionSentencesEditField.Value = num2str(0);
            app.VowelsEditField.Value = num2str(0);
            app.NonVowelsEditField.Value = num2str(0);
      
        end
    end

4. Spajanje rijeci,slova,suglasnici..
% Button pushed function: SpajanjeRijeciButton
        function SpajanjeRijeciButtonPushed(app, event)
        % Uzmi tekst iz EditField
        sentence = app.EditField.Value;
        
        % Razdvoji riječi po razmacima (ili drugim separatorima ako su uneseni)
        words = strsplit(sentence);  % Razdvaja riječi po razmacima
       
        mergedSentence = strjoin(words, '');  % Spaja riječi razmakom
        
        % Postavi spojeni tekst u ResultTextArea
        app.ResultTextArea.Value = mergedSentence;
        end

% Button pushed function: SlovaiSuglasniciButton
        function SlovaiSuglasniciButtonPushed(app, event)
            sentence = app.EditField.Value;
            vowels = 'aeiouAEIOU';
            numVowels = sum(ismember(sentence, vowels));
            numNonVowels = sum(~ismember(sentence, vowels) &amp; isletter(sentence));
            app.ResultTextArea.Value = sprintf('Broj slova: %d\nBroj suglasnika: %d\n', numVowels + numNonVowels, numNonVowels);
        end

% Button pushed function: 
        % BrojRecenicaBrojRijeciBrojSuglasnikaButton
        function BrojRecenicaBrojRijeciBrojSuglasnikaButtonPushed(app, event)
            sentence = app.EditField.Value;
            words = strsplit(sentence);
            result = '';
            vowels = 'aeiouAEIOU';
            
            for i = 1:length(words)
                word = words{i};
                numVowels = sum(ismember(word, vowels));
                result = [result, sprintf('Riječ: %s\n Broj slova: %d\n Broj samoglasnika: %d\n Samoglasnici: %s\n', ...
                    word, length(word), numVowels, word(ismember(word, vowels)))];
            end
            
            app.ResultTextArea.Value = result;
        end
    end

5. Funckija sa omegom
% Button pushed function: PrikaziButton
        function PrikaziButtonPushed(app, event)
            % Get parameter values from GUI
            T = app.TEditField.Value;
            omega = app.OmegaEditField.Value;
            phi = app.PhiEditField.Value;
            t_min = app.TminEditField.Value;
            t_max = app.TmaxEditField.Value;

% Generate time vector
            t = linspace(t_min, t_max, 100);

% Calculate function f(t)
            f = exp(-t/T) .* sin(omega*t + phi);

% Plot the function
            plot(app.UIAxes, t, f);
            xlabel(app.UIAxes, 't');
            ylabel(app.UIAxes, 'f(t)');
            title(app.UIAxes, 'Prikaz funkcije');
        end
    end

6. Smajlic
% Button pushed function: SretniButton
        function SretniButtonPushed(app, event)
% Kreiranje koordinata za smajlića
    t = 0:pi/50:2*pi;
    x_head = 4 * cos(t);
    y_head = 4 * sin(t);
    
    x_eye1 = cos(t) - 2;
    y_eye1 = sin(t) + 1.5;
    
    x_eye2 = cos(t) + 2;
    y_eye2 = sin(t) + 1.5;
    
    t_mouth = pi:pi/50:2*pi;
    x_mouth = 3 * cos(t_mouth);
    y_mouth = 3 * sin(t_mouth);
    
        % Prikazivanje smajlića na UIAxes komponenti
    plot(app.UIAxes, x_head, y_head, 'LineWidth', 2, 'Color', 'yellow');
    hold(app.UIAxes, 'on');  % Drži trenutni grafikon
    
    plot(app.UIAxes, x_eye1, y_eye1, 'LineWidth', 2, 'Color', 'black');
    plot(app.UIAxes, x_eye2, y_eye2, 'LineWidth', 2, 'Color', 'black');
    plot(app.UIAxes, x_mouth, y_mouth, 'LineWidth', 2, 'Color', 'black');
    
    hold(app.UIAxes, 'off');  % Završi držanje grafikona

end

% Button pushed function: TuzniButton
        function TuzniButtonPushed(app, event)
% Kreiranje koordinata za tužnog smajlića
t = 0:pi/50:2*pi;
    x = 4 * cos(t);
    y = 4 * sin(t);
    
    t1 = 0:pi/50:2*pi;
    x1 = cos(t1) - 2;
    y1 = sin(t1) + 1.5;
    
    t2 = 0:pi/50:2*pi;
    x2 = cos(t2) + 2;
    y2 = sin(t2) + 1.5;
    
    t3 = pi:pi/50:2*pi;
    x3 = 3 * cos(t3);
    y3 = -3 * sin(t3) - 2.3;
    
       % Prikazivanje tužnog smajlića na UIAxes komponenti
    plot(app.UIAxes, x, y, 'LineWidth', 2, 'Color', 'yellow');
    hold(app.UIAxes, 'on');  % Drži trenutni grafikon
    
    plot(app.UIAxes, x1, y1, 'LineWidth', 2, 'Color', 'black');
    plot(app.UIAxes, x2, y2, 'LineWidth', 2, 'Color', 'black');
    plot(app.UIAxes, x3, y3, 'LineWidth', 2, 'Color', 'black');
    
    hold(app.UIAxes, 'off');  % Završi držanje grafikona
        end
    end

7. Zastava mijenja boju
% Button pushed function: PromijeniBojuButton
        function PromijeniBojuButtonPushed(app, event)
% Clear previous plot
    cla(app.UIAxes);

% Generate random color for the flag
    color = rand(1, 3); % Random RGB color

% Generate data
    t = 0:0.1:4*pi;
    y1 = 1/2*sin(t) - 1;
    y2 = 1/2*sin(t) + 1;

% Plot on UIAxes
    hold(app.UIAxes, 'on');
    area(app.UIAxes, t, y2, 'FaceColor', color, 'EdgeColor', color);
    area(app.UIAxes, t, y1, 'FaceColor', color, 'EdgeColor', color);
    hold(app.UIAxes, 'off');

% Set axes properties
    xlabel(app.UIAxes, 'X osa');
    ylabel(app.UIAxes, 'Y osa');
    title(app.UIAxes, 'Grafikon na UI Axes');
    axis(app.UIAxes, [-2 15 -2 2]); % Set axis limits
        end
    end

8. GUI sa matricom A, treba izaci B
% Button pushed function: IzracunajButton
        function IzracunajButtonPushed(app, event)
            A_str = app.ElementiMatriceATextArea.Value;

% Split the input string into lines
lines = splitlines(A_str);

% Initialize matrix A
A = [];

% Iterate through each line and convert to numbers
for i = 1:numel(lines)
    line = strtrim(lines{i}); % Remove leading/trailing whitespace
    if ~isempty(line)
        row = str2double(strsplit(line)); % Convert line to numbers
        A = [A; row]; % Append row to matrix A
    end
end

% Check if A is empty or not a valid matrix
if isempty(A) || any(isnan(A(:)))
    % Display error if input is not a valid matrix
    app.OutputTextArea.Value = 'Error: Invalid matrix input.';
    return;
end

% Calculate matrix B
    % a) Exclude the last column of A
    B_a = A(:, 1:end-1);

% b) Exclude the first row of A
    B_b = A(2:end, :);

% c) Change signs of elements in the intersection of last row and first column
    A(end, 1) = -A(end, 1);
    B_c = A;

% Display matrix B in OutputTextArea
    app.ElementiMatriceBTextArea.Value = sprintf(['B (iskljucenje zadnje kolone):\n%s\n\nB (iskljucenje prvog reda):\n%s\n\nB (presjek' ...
        '):\n%s'], ...
        mat2str(B_a), mat2str(B_b), mat2str(B_c));
        end
    end

9. Trostrana piramida:
% Button pushed function: PrikazipiramiduButton
        function PrikazipiramiduButtonPushed(app, event)
         height = app.VisinaPiramideEditField.Value;
        baseLength = app.DuzinaOsnoviceEditField.Value;

% Calculate the vertices of the tetrahedron
        A = [0, 0, 0];
        B = [baseLength, 0, 0];
        C = [baseLength/2, baseLength*sqrt(3)/2, 0];
        D = [baseLength/2, baseLength*sqrt(3)/6, height];

% Define the faces of the tetrahedron
        faces = [
            1, 2, 3;
            1, 3, 4;
            1, 4, 2;
            2, 3, 4
        ];

% Plot the tetrahedron
        cla(app.UIAxes); % Clear previous plot
        hold(app.UIAxes, 'on');
        patch(app.UIAxes, 'Vertices', [A; B; C; D], 'Faces', faces, 'FaceColor', 'magenta', 'EdgeColor', 'k');
        view(app.UIAxes, 3); % Set 3D view
        axis(app.UIAxes, 'equal'); % Set equal axis scales
        xlabel(app.UIAxes, 'X');
        ylabel(app.UIAxes, 'Y');
        zlabel(app.UIAxes, 'Z');
        title(app.UIAxes, 'Tetrahedron');
        hold(app.UIAxes, 'off');
        end
    end

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