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Tommy

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269 total contributions since 2017

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How can I extract points (sum of values) from variable size groups of lines (separated from NaN values) in the same column ?
Potentially over-complicated but should work: cA = cumsum([A, B],'omitnan'); idx = [isnan(A(2:end)); 1] & ~isnan(A); C = diff...

alrededor de 7 horas ago | 1

How to split the data inside the matrix correctly?
Here's another uglier way. C = mat2cell(matrix, diff([0; find(diff(matrix(:,2))); size(matrix,1)]), 2);

alrededor de 7 horas ago | 0

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Using sign function in Matlab
sign(x) returns a matrix the same size as x. If the dimensions of x (and therefore sign(x)) are N-1 x 1 and the dimensions of D2...

alrededor de 8 horas ago | 0

How to do correlation between each row of two matrices?
The default correlation coefficient which corr calculates is described here (the Pearson linear correlation coefficient): https...

alrededor de 11 horas ago | 0

how to get cartesian equation from parametric equation
Maybe something like this? syms t x y eqns = [x == 10*t^2; y == 2*t^2]; out = subs(eqns(2), t, rhs(isolate(eqns(1), t))); wh...

1 día ago | 0

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Input data, round down, loop variable
How does this work? (I'm assuming T.y is monotonically increasing) % example table: x = randi(10,59,1); y = cumsum(rand(59,1)...

1 día ago | 1

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How do I plot on the same figure from 2 functions?
When you name a variable in your function figure, you can no longer access the function figure(). For example: >> figure = 1; ...

1 día ago | 0

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How can I remove the error "unable to perform because the indices on the left side are not compatible with the size of the right side"
It seems like you are calling sum on 2D arrays, so each output would be a row vector, which you can't store within Output(i). Yo...

1 día ago | 0

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Y axis in scientific form
How does this work for you? ax = axes; plot(ax, 1:10, (1:10).^10) % get rid of 'x 10^N' in corner ax.YAxis.Exponent = 0; ...

1 día ago | 0

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how to skip the index of array
Alternatively, idx = [1,2,1,2,4]; N = 6; % max index out = repmat(1:N, numel(idx), 1)'; out = reshape(out(out ~= idx), [],...

1 día ago | 0

Matrix dimensions must agree
A is a 4x9 array, so A' is a 9x4 array. A.*A' This tries to use element-wise multiplication on A and A', but they aren't the s...

1 día ago | 0

How do I fix my legend?
You can still use the same idea as Ruger28's comment, just pull the pertinent values from mutualInfoTotal: baseNames = {'T9C11'...

1 día ago | 0

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How to find the time of event?
For this sample matrix: >> matrix = [cumsum(10*rand(25,1)), rand(25,1) < 0.1] matrix = 2.6774 0 3.9889 ...

2 días ago | 0

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How to check an array for its content?
It sounds like you want to make sure isnan and isempty do return 0. Also, there is no need to explicitly check if the result of ...

2 días ago | 0

Reverse the Colormap of Surf plot
Grab the colormap and flip it upside down: f = figure; surf(peaks(50)) colormap(f, flipud(colormap(f))) colorbar

2 días ago | 1

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Findpeaks: find the interpolation points for the width with the x axis
After you call findpeaks, you could obtain a handle to the current axes, find the handle(s) to the yellow horizontal line(s) whi...

2 días ago | 0

How can i see if the value occurs in an array for the first time?

3 días ago | 0

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How to count the number of "" true "" and ""false"" in matrix
How to show a message "True is 66.7%" fprintf('True is %.1f%%\n', 100*TRUES/numel(a));

3 días ago | 0

"1D" scatter plot without x-axis
If you only have one-dimensional data but you want to display it on two axes, you'll have to tell MATLAB where (i.e. if you have...

3 días ago | 0

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Keyboard Function Not Responding
Add a drawnow before your pause(.01) to flush the graphics queue. Or use a longer pause, but of course that messes with the ani...

3 días ago | 1

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"Invalid second data argument" error while using "plot" function (Lagrange Interpolation)
You are correct, it is complaining because pointy1 is a function handle. You can obtain the output of pointy1 when evaluated at ...

3 días ago | 1

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how to plot a vector
Vsw is a scalar, so nothing will show when you plot it. You are overwriting the value of Vsw in each loop of your for loop. Do y...

5 días ago | 1

cannot fill table with chars?
x=[1;2;3]; y=[4;5;6]; T=table(x,y); T.words = repmat({''}, 3, 1); % this creates a 3x1 cell array After these lines, T.words...

5 días ago | 0

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Plot: x axis and y axis values with commas as 1000 separators
You can format the tick labels using the TickLabelFormat property of the axis. For example: ax = axes('YScale','log'); plot(ax...

5 días ago | 0

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Saving data in a FOR loop
Does this work? n=2:50; b = zeros(numel(n),1); for i = 1:numel(n) a = (t_r>=Tvec(n(i))-dt/2) & (t_r<Tvec(n(i))+dt/2); ...

8 días ago | 0

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How can I export text and numeric data from excel to uitable (GUI element)
According to the docs, when you set the Data property of a uitable created with the figure function, you must set it to a numeri...

8 días ago | 0

cellfun vs. varfun applied to column of table
varfun passes entire variables from your table into your function. It calls your function once per table variable. The variable ...

9 días ago | 1

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rotate colorbar tick labels
You could place the labels yourself using text. Personally, I'd rather MATLAB figure out the placement. Here's code which puts ...

9 días ago | 0

transform fprintf in disp
Maybe this? disp(sprintf('\nPara i= %d\n e a= %f e a resposta Ã©: %f ', i, n, c)) You'll get a warning that fprintf is prefe...

9 días ago | 0