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Why do I get this error 'Array indices must be positive integers or logical values.'
Perhaps a missing operator after k7. Perhaps a *

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Sum matrixes from cells
sum(cat(3,C{:}),3)

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cant call function from a file
Use if input_bits(bit) == '0' instead of if bit == '0' and similarly for the elseif statement. bit is the index; input_bit...

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how to draw contour error graph by using vector-like formation data
% plot the contour f = @(x,y)5*x.^2-6*x.*y+5*y.^2; [X,Y] = meshgrid(linspace(-1.5,1.5,100)); contour(X,Y,f(X,Y),linspace(0.5,...

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Image recognition of numbers
Try changing the specified Layout type to 'word' load image imshow(TEMP) ocrOutput = ocr(TEMP, 'TextLayout', 'word', 'chara...

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Function with ln and sin
These are the MATLAB functions you might need: https://www.mathworks.com/help/matlab/ref/log.html https://www.mathworks.com/he...

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Conversion of Categorical to char while maintaining same dimension
You cannot do that in general. In the special case that all the categories are a single character long, then you can do it: m ...

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Hello, I have an array of values in "In", I would like to extract the samples in "In" between the indices specified in "SIdx" and "EIdx". SIdx and EIdx are also arrays.
In = 1:100; SIdx = [1 9 33 76]; EIdx = [5 13 42 83]; siz = zeros(1,2*numel(SIdx)-1); siz(1:2:end) = EIdx-SIdx+1; siz(2:2:...

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find value every time counter increase by 2.
a = [0 0 0 0 1 1 2 2 3 3 3 3 4]'; %Counter b = [0 1 2 3 4 5 6 7 8 9 10 11 12]'; %value to be found c = [0 0 0 0 0 1 1 0 0 ...

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Is there a way to refer to elements in Matlab App using variables?
for r = 1:3 for c = 1:3 app.(sprintf('Button_%d_%d',r,c)).Text = app.images(app.grid(r,c),1); end end

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Hello, I have a cell array with the list of files I would like to delete. However I would not like to use a for loop to loop through each file to delete it.
Pass the file names as arguments to delete(). Since the names are already in a cell array, this is easy: delete(Files{:}) Demo...

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Interpolation to arbitrary points on a patch plot
%Values of points q = [0;2.00997512422418;2.11482859825566;0;... 1.50960259671213;1.00498756211209;1.47648230602334]; RGB...

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How can I save axes data for recall without keeping the handle?
You can use the syntax subplot(m,n,p,ax) to use an existing axes as a subplot in the same figure. Example: % create a figure a...

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How can I change the colour of the axes?
hfig = figure; % save the figure handle in a variable num = [1]; den = [1 20 20]; sys = tf(num, den); ts = 0.01; sys_d =...

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how to plot phase and frequency
K = 0.5; t_d = 0.001; % 1 ms f = linspace(0,10000,1000); % 1000 f values from 0 to 10 kHz Av = 1+K*exp(-1j*2*pi*f*t_d); ...

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Save an annotation onto a figure programmatically in app designer
Annotations are children of an annotation pane which has HandleVisibility 'off' by default, so it doesn't show up in the parent ...

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How to plot from a specific point?
Vector=[20;50;0]; Traslacion=[10;-15;10]; XYZ = [Vector,Traslacion]; plot3(XYZ(1,:),XYZ(2,:),XYZ(3,:),'r','LineWidth',3) ...

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How to generate different filename with each iteration of code?
mypath = "C:\"; % string (with double quotes) methods = {'OLS', 'RF'}; dependent_vars = {'act_y_ha', 'act_per_ha'}; % strin...

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Applying Colormaps to Scatter3 Plots
"Do you have any idea how I could correlate the color of the point to the z-axis?" If that's what you want to do, the easy way ...

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Arrays have incompatible sizes for this operation.
It seems unlikely that you mean to be doing numerical operations on character vetors like that 1/2.*'sigma_0' Maybe you meant ...

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How to solve this problem?
y = 0.3; df = rand(3,4) % random matrix df = double(df >= y)

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I want to add a next page for my appdesigner, how do I code the 'next page' button to lead me from homepage to next pagee?
Here's a simple app with a tab group and two buttons that navigate back and forth through the tabs. The tab group is taller than...

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Plotting a function inside of another function with no outputs
You need to pass the inputs to projAlt_kweave19 v_0=200; theta_0=45; t=(1:1:100); plotProj_kweave19(v_0,theta_0,t) % call plot...

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how to plot 50 percentile?
filename = 'Book11.csv'; M = readtable(filename); disp(M) a=M{:,3}; rcs=M{:,4}; idx = a >=120 & a <= 240; p = a(idx); ...

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Split bar chart with specific colours for each variable
ydata(k) is a single element of ydata, so b1 = bar(xdata(k), ydata(k)); produces a single bar, i.e., b1 is of length 1. Trying...

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Load one file from many different folders
You can use wildcard characters in dir to find files in many different folders. Examples: % some directory that contains all f...

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Removing risidual ticks from second x axis
You can turn the "box" off for any axes that has it on, which removes the axes lines and ticks from the sides opposite the AxisL...

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Having issue in Start date and end date picker to plot data to graph from excel data
Here's one way to get the table app.t to contain data in a form that's convenient for plotting, rather than cell arrays of chara...

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Memasukkan Grafik Beberapa Gelombang yang Digabung ke dalam Desai Axes GUI
Delete the line figure;

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How to have Row Names extend to empty rows.
filename = 'C3_NGHD_E369.e001.p000_Freightliner_DD13_2021_ModeAB_11Spd_C3_1.txt'; T = readtable(filename, 'Delimiter',{',',';',...

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