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Code still functioning according to lines of code I have deleted

/ 2024-07-31 / Matlab

I’m trying to make a text box that the user can type into, which then retreives and prints that text when the user clicks enter. Two days ago it was working perfectly. Yesterday it stopped working properly. It prints the currently held text AND THEN updates with the what the user has input. So if I type in "bob" and click enter, nothing displays. If I delete "bob" and type in "peter", and click enter, it displays bob. Click enter again, and it displays "peter".
It got to the point that I just deleted the code and tried to start over. FOR SOME REASON, it still acts exactly the same, updating the text only when I click enter, despite the fact that I have no lines of code that refer to the enter key.
This is what I have right now:
function codeComponentResponse
fig = uifigure(‘position’,[2 50 637 641]);
TextArea = uieditfield(fig, ‘Position’,[100 100 500 30]);

fig.WindowKeyPressFcn = {@CoolGuy, fig, TextArea};

function CoolGuy(src, event, figure, field)
text = field.Value;
disp(text)
end
endI’m trying to make a text box that the user can type into, which then retreives and prints that text when the user clicks enter. Two days ago it was working perfectly. Yesterday it stopped working properly. It prints the currently held text AND THEN updates with the what the user has input. So if I type in "bob" and click enter, nothing displays. If I delete "bob" and type in "peter", and click enter, it displays bob. Click enter again, and it displays "peter".
It got to the point that I just deleted the code and tried to start over. FOR SOME REASON, it still acts exactly the same, updating the text only when I click enter, despite the fact that I have no lines of code that refer to the enter key.
This is what I have right now:
function codeComponentResponse
fig = uifigure(‘position’,[2 50 637 641]);
TextArea = uieditfield(fig, ‘Position’,[100 100 500 30]);

fig.WindowKeyPressFcn = {@CoolGuy, fig, TextArea};

function CoolGuy(src, event, figure, field)
text = field.Value;
disp(text)
end
end I’m trying to make a text box that the user can type into, which then retreives and prints that text when the user clicks enter. Two days ago it was working perfectly. Yesterday it stopped working properly. It prints the currently held text AND THEN updates with the what the user has input. So if I type in "bob" and click enter, nothing displays. If I delete "bob" and type in "peter", and click enter, it displays bob. Click enter again, and it displays "peter".
It got to the point that I just deleted the code and tried to start over. FOR SOME REASON, it still acts exactly the same, updating the text only when I click enter, despite the fact that I have no lines of code that refer to the enter key.
This is what I have right now:
function codeComponentResponse
fig = uifigure(‘position’,[2 50 637 641]);
TextArea = uieditfield(fig, ‘Position’,[100 100 500 30]);

fig.WindowKeyPressFcn = {@CoolGuy, fig, TextArea};

function CoolGuy(src, event, figure, field)
text = field.Value;
disp(text)
end
end uifigure, uieditfield, callback, text field MATLAB Answers — New Questions

How to interpolate at NaN values?

/ 2024-07-31 / Matlab

I have a vector [1 2 3 NaN 4 4.5 5.5 NaN NaN 6 6 7 NaN NaN NaN 8] and I want [1 2 3 3.5 4 4.5 5.5 5.75 5.75 6 6 7 7.5 7.5 7.5 8]. Is it possible to do this without a for cycle?I have a vector [1 2 3 NaN 4 4.5 5.5 NaN NaN 6 6 7 NaN NaN NaN 8] and I want [1 2 3 3.5 4 4.5 5.5 5.75 5.75 6 6 7 7.5 7.5 7.5 8]. Is it possible to do this without a for cycle? I have a vector [1 2 3 NaN 4 4.5 5.5 NaN NaN 6 6 7 NaN NaN NaN 8] and I want [1 2 3 3.5 4 4.5 5.5 5.75 5.75 6 6 7 7.5 7.5 7.5 8]. Is it possible to do this without a for cycle? for, vector, nan, interpolation MATLAB Answers — New Questions

Solving Eigenvalues of a system time-varying which is 5×5 matrix

/ 2024-07-31 / Matlab

I am trying to solve this system by using a desired eigenvalues to be equated to the det(SI-A) ,so every thing in that matrix is know except Lambda’s , I decoupled the problem by making eta_tilde=0 and then e =0 and I managed to obtain L and it was easier to get L in that way ,but the problem now is to obtain lambda that makes this matrix aysmptoically stable , SINCE it is linear time-varying w.r.t the error so according to lypunov it is better to check the stablity of (A^T+A) to place the eigenvalues to zero, it is complex to solve manually ,so I used the matlab to get the det(SI-A) symbolically ,but how to solve for lambda’s.I am trying to solve this system by using a desired eigenvalues to be equated to the det(SI-A) ,so every thing in that matrix is know except Lambda’s , I decoupled the problem by making eta_tilde=0 and then e =0 and I managed to obtain L and it was easier to get L in that way ,but the problem now is to obtain lambda that makes this matrix aysmptoically stable , SINCE it is linear time-varying w.r.t the error so according to lypunov it is better to check the stablity of (A^T+A) to place the eigenvalues to zero, it is complex to solve manually ,so I used the matlab to get the det(SI-A) symbolically ,but how to solve for lambda’s. I am trying to solve this system by using a desired eigenvalues to be equated to the det(SI-A) ,so every thing in that matrix is know except Lambda’s , I decoupled the problem by making eta_tilde=0 and then e =0 and I managed to obtain L and it was easier to get L in that way ,but the problem now is to obtain lambda that makes this matrix aysmptoically stable , SINCE it is linear time-varying w.r.t the error so according to lypunov it is better to check the stablity of (A^T+A) to place the eigenvalues to zero, it is complex to solve manually ,so I used the matlab to get the det(SI-A) symbolically ,but how to solve for lambda’s. #eigenvalues #stablity #ltv MATLAB Answers — New Questions

Filling a shape with Geoplot

/ 2024-07-31 / Matlab

I am creating a polygon using coordinate points with geoplot, and I would like to fill the resultant shape in a partially transparent blue color. I am able to create the filled shape, and I can overlay the outline on the map with geoplot, but I cannot do both.

%% Plot

% Create a figure
figure;

% Create a geographic axes
gx = geoaxes;
hold(gx, ‘on’);

% Define the indices of visible points
visibleIndices = maxRadiusPerAngle > 0;

% Close the loop by adding the first point at the end
latTargetsClosed = [latTargets(visibleIndices) latTargets(visibleIndices(1))];
lonTargetsClosed = [lonTargets(visibleIndices) lonTargets(visibleIndices(1))];

% Plot the outline of the polygon using geoplot
geoplot(gx, latTargetsClosed, lonTargetsClosed, ‘b-‘, ‘LineWidth’, 2);

% Plot the central point
geoplot(gx, latCenter, lonCenter, ‘ro’, ‘MarkerSize’, 8, ‘MarkerFaceColor’, ‘r’);

% Plot the visible points
geoplot(gx, latTargets(visibleIndices), lonTargets(visibleIndices), ‘go’, ‘MarkerSize’, 6, ‘MarkerFaceColor’, ‘g’);

% Set the basemap
geobasemap(gx, ‘streets’);
title(‘Furthest Outward Points with Positive LOS’);

% Define the Web Mercator projection
projCRS = projcrs(3857); % EPSG:3857 Web Mercator

% Convert geographic coordinates to projected coordinates
[x, y] = projfwd(projCRS, latTargetsClosed, lonTargetsClosed);

% Create a new Cartesian plot for the filled polygon, ensuring it overlays the geographic axes
figure;
hold on;

% Create a filled polygon in the Cartesian plot
fill(x, y, ‘b’, ‘FaceAlpha’, 0.3, ‘EdgeColor’, ‘none’);

% Set Cartesian axes limits to match the geographic plot
axis equal;
xlabel(‘X (meters)’);
ylabel(‘Y (meters)’);
title(‘Filled Polygon in Projected Coordinates’);

% Adjust the limits to fit the geographic plot
latlim = gx.LatitudeLimits;
lonlim = gx.LongitudeLimits;
[xlim, ylim] = projfwd(projCRS, [latlim(1), latlim(2)], [lonlim(1), lonlim(2)]);
set(gca, ‘XLim’, xlim, ‘YLim’, ylim);

% Ensure the Cartesian plot is visible
set(gcf, ‘Visible’, ‘on’);I am creating a polygon using coordinate points with geoplot, and I would like to fill the resultant shape in a partially transparent blue color. I am able to create the filled shape, and I can overlay the outline on the map with geoplot, but I cannot do both.