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the cyclist


Last seen: Today
4,264 total contributions since 2011

Data scientist at Cohen Veterans Bioscience; Obsessive runner. Professional Interests: Predictive modeling, statistics. (I don't respond to email via author page, but will usually look at a question if you send me a link to it.)

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Answered
Difference between errorbar and errorbarxy (function)
See this example from the documentation for errorbar.

7 days ago | 0

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Answered
Creating Global Stiffness matrix
If I've understood correctly, then K = zeros(8); vec1 = [1 2 3 4 7 8]; K(vec1,vec1) = K(vec1,vec1) + k1; vec2 = [5 6 7 8...

8 days ago | 1

Answered
Average of a column without including a certain number
There is no specific function for this, but it is easy to do without a loop: A = [6; 3; 6; 4]; N = 6; mean_A_without_N = mean...

8 days ago | 1

Answered
customize legend: extra legend entry
"The first item doesn't belong to any graph" immediately indicates to me that this text does not belong in the legend, for two r...

8 days ago | 0

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Answered
How to set "dbstop if error" only to stop in my code
I don't think that that is possible. Are you aware of the "function stack" capability in the user interface? I show a screensho...

9 days ago | 0

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Answered
Repeated Measures ANOVA Matlab
If you have the Statistics and Machine Learning Toolbox, you can use the anovan function. In particular it looks like this examp...

9 days ago | 0

Answered
How do I calculate percentage or frequency and display it on a bar plot?
Because you have the typo rate=(frequency/total):100; instead of rate=(frequency/total)*100;

10 days ago | 0

Answered
Symbols instead of line with plot
It looks like it might be because k_ is only a single value, the last one of the loop. Maybe you wanted k_(i) = k; in the lo...

10 days ago | 0

Answered
Help Using readmatrix or readcell
According to the documentation, there is no two-output syntax for the readmatrix command. You'll need to get a deeper understand...

10 days ago | 0

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Answered
How to process multiple Excel files using the same Matlab code for each
If you can make a cell array of the filenames, eg. filenames = {'this file.csv','that file.csv','oh this file too.csv'} then y...

10 days ago | 0

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Answered
Index exceed number of array elements(1)
In your function, the input is a character array, but you convert it to a string. The expression Testdate(7:10) would have pul...

10 days ago | 0

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Answered
How can I set the y tick interval (to powers of 10) on a log scale?
Like this? N = 500; x = sort(1e3*rand(N,1)); y = sort(1e6*rand(N,1)); figure loglog(x,y) set(gca,'XLim',[1e1 1e4],'XTick...

13 days ago | 0

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Answered
Is it possible to set the size of the gap between grouped bars in a bar graph?
Another option would be to abandon using grouped bars in a single call to bar(), and instead plot the two sets of bars with two ...

13 days ago | 0

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Answered
Is it possible to set the size of the gap between grouped bars in a bar graph?
This question and the answer from MATLAB staff suggest that it is not possible using the built-in bar function. However, there ...

13 days ago | 0

Answered
How to plot a line over a specific interval?
Can you upload the data? Specifically, it is unclear to me what sort of data type g is. Instead of plotting x, you'll want to d...

13 days ago | 0

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Answered
create a variable and specify its column
The specifics will depend on what format the variable day is. Here, I assume it is a datetime. % Create the table day = dateti...

14 days ago | 1

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Answered
sort boxplot based on 25-75th percentiles
Yes, it is possible. The algorithm would be something like Find the percentiles on the data, using the prctile command, before ...

15 days ago | 0

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Answered
Index in position 1 exceeds array bounds (must not exceed 26)
You haven't provided enough info to run your code, which would make debugging much easier. You also didn't tell us which line gi...

16 days ago | 0

Answered
trying to use logical matrix to get remove some elements from matrix instead of getting a same matrix im getting a column matrix
Assuming you want zeros in the other locations: a=[1,2,3;12,21,2;2,1,2] b=(a>1) c = zeros(size(a)); c(b)=a(b) c = ...

17 days ago | 1

Answered
How to check what part of an array isn't scalar?
Just to clarify, are you saying that you have a categorical array, you are trying to apply the unique command to that array, and...

17 days ago | 0

Answered
My output did not display in command windows when using script
The syntax you used, fprintf(fid,...) is explicitly for writing to files. Use fprintf(...) % without "fid" argument to write...

17 days ago | 1

Answered
(Array indices must be positive integers or logical values.) any help plz
The specific reason you get that error is that sx is complex number. sx is complex because s is complex. s is complex because ...

17 days ago | 1

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Answered
How to change the plot title and file name when saving it to a for loop
Part of the problem is that you are mixing character arrays and strings. The following works (after you set your own outputdir):...

17 days ago | 1

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Answered
For loop to calculate distance between a 5d dimensional data point and another matrix
The distance from the i-th point of T to the j-th centroid is sqrt(sum((T(:,i) - centroids(:,j)).^2)); % Check my formula here,...

19 days ago | 0

Answered
I have a variable with a string that I would like to use as a filename, how do I input that string into a function rather than the variable name?
I think I see the problem. Did you notice that the output of the inputdlg command is a cell array? You need the contents of that...

20 days ago | 0

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Answered
array and logicals; deleting columns
Here is one way. arr = [1 2 3; 4 5 6; 7 8 9]; logic = [false true false]; new = arr(:,not(logic))

21 days ago | 0

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Answered
Indexing problem. I want to insert a vector into another vector with a loop.
Here is one way. A = [5 4 3]; B = [1 -1 -1 1 0 0 0 0 0 0 0 0 0 0]; for nb = 0:numel(B)-4 output = [A circshift(B,nb)...

21 days ago | 0

Answered
how to specify y axis?
Try this: clear clc clf x=1:1:24 yyaxis right y =[0,0,0,0,0,2.879097736,22.91004173,45.42868867,58.31916249,64,65,66,65,6...

21 days ago | 0

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Answered
how to specify y axis?
set(gca,'YTick',[0 500 1000],'YTickLabel',[0 500 1000])

21 days ago | 1

Answered
Error Using fprintf Invalid file identifier. Use fopen to generate a valid file identifier.
Is this good enough? I = rand(2); if ~isnan(I) I if abs(I)>2 fprintf("Violated Bell Inequality"); end else f...

21 days ago | 0

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