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the cyclist


Last seen: 1 día ago
4.268 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
How to change two variables in one loop?
There are many things about your question that I don't fully understand. The least important is whether you meant the loop to go...

3 días ago | 0

Answered
Error using cd, Cannot CD
This code works for me when mfilename is a file that exists in my path, but otherwise it gives that error. So, my guess is that ...

4 días ago | 0

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Answered
Add new row to String Array.
You can preallocate memory for the entire string array with str = strings(200000,1); and then fill row-by-row rather than appe...

4 días ago | 1

Answered
connect matlab to the cloud
Did you try to google "matlab amazon azure"? When I did, this link about using MATLAB in the Cloud was the first hit, and it has...

4 días ago | 0

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

11 días 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...

12 días 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...

12 días 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...

12 días 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...

13 días 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...

13 días 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;

14 días 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...

14 días 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...

14 días 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...

14 días 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...

14 días 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...

17 días 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 ...

17 días 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 ...

17 días 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...

17 días 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...

18 días 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 ...

19 días 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...

20 días 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 = ...

21 días 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...

21 días 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...

21 días 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 ...

21 días 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):...

21 días 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,...

23 días 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...

24 días 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))

25 días ago | 0

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