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Tommy


Last seen: Today
257 total contributions since 2017

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Answered
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 ...

12 hours ago | 0

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Answered
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 ...

12 hours ago | 0

Answered
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

12 hours ago | 1

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Answered
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...

13 hours ago | 0

Answered
How can i see if the value occurs in an array for the first time?
Try one of these. condition = ~ismember(loadp(i),loadp(1:i-1)); % or condition = find(loadp==loadp(i),1) == i; They should b...

22 hours ago | 0

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Answered
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));

22 hours ago | 0

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"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...

1 day ago | 0

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Answered
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...

1 day ago | 0

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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 ...

1 day ago | 1

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Answered
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...

3 days ago | 1

Answered
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...

3 days ago | 0

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Answered
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...

3 days ago | 0

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Answered
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); ...

6 days ago | 0

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Answered
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...

6 days ago | 0

Answered
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 ...

7 days ago | 1

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Answered
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 ...

7 days ago | 0

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

7 days ago | 0

Answered
Adding Legend to a multiple graph within a loop
The legend should show after you call legend(), i.e.: clear all close all clc hold on data=dlmread('data.txt') for i= 1:27...

8 days ago | 0

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Answered
assume(x^2 == y) doesn't work
From the docs, "assume is not additive. Instead, it automatically deletes all previous assumptions on the variables in conditio...

8 days ago | 0

Answered
Histogram with adjusted bins to gaussian
If you'd like to fit a histogram to a normal distribution but you don't know the underlying data (e.g. you've altered the histog...

11 days ago | 0

Answered
MATLAB drawrectangle ROI custom wait function difficulty
Store the figure in h so that when you later call close(h), MATLAB knows what h is: h = figure(1);

12 days ago | 0

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Answered
How to edit grid lines on a 3D plot
It seems to me that Dillen.A's answer from your link is pretty elegant. Adapting that code to work with 3D axes: f = figure; ...

12 days ago | 0

Answered
Matlab Sort Command Output
How about this? x1=3; x2=1; x3=2; a=[x1 x2 x3]; varNames = {'x1','x2','x3'}; [~, idx] = sort(a); fprintf('Output:\n%s\n',...

13 days ago | 1

Answered
Compare elements from two matrix.
How about this? x = x1; idx = abs(x1) < abs(x2); x(idx) = x2(idx);

13 days ago | 0

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Answered
Subscript indices must either be real positive integers or logicals.
thetat=0:0.012566:0.6283; for idx = 1:numel(thetat) % use thetat(idx) to access the appropriate theta value in any iterati...

13 days ago | 0

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Answered
Value assignment to vector, without loop
Here's an option: N = 20; idx = (1:N)'; out = (idx >= frm & idx <= to)*value'; The indices in frm and to can't overlap, and ...

14 days ago | 1

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Answered
How do you display a users input into an questdlg command?
fprintf prints text to a file which corresponds to the supplied file ID or, if you don't supply a file ID, the command window (f...

14 days ago | 0

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Answered
How can i prevent the plots from appearing while still using them as frames for the movie function?
Plot your frames on a figure whose Visible property is set to 'off': fig = figure('Visible', 'off'); ax = axes(fig); x = lins...

15 days ago | 0

Answered
Vectors must be the same length with plot of Shear Force Diagram
If you look in the workspace, you should see that X has length 200 while V has length 101. If you want to plot V over X, they ne...

15 days ago | 0

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Answered
subplot question - with image and plot
This is possible by setting the parent axes in your call to imshow: subplot(1,2,1); plot(rand(10,1)); ax = subplot(1,2,2); i...

15 days ago | 0

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