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Bob Thompson


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379 total contributions since 2016

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Answered
loop: stop if value repeats
I'm assuming you have all four of these commands within some kind of loop. Without the loop I have not tested what I'm going to ...

7 days ago | 0

Answered
How to sequentially import csv files, access, edit and save the data?
To save the results of a command each time you go through the loop you need to index the output. I recommend just adding a struc...

7 days ago | 0

Answered
Creating matric of multiple arrays
You should be able to accomplish what you're looking for with some matrix indexing, no loop necessary. x = 1:100; k = 12; a =...

8 days ago | 0

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Answered
What is wrong with this code?
I would think you could do this with cellfun and some logic, but I could be wrong. cellfun(@(s) s((1:end)<0,1) = NaN,Radiidiffe...

8 days ago | 0

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Textscan for comma seperated file with mixed format
Have you tried using readtable? It has a delimited text option, and tends to be a bit better about handling different types of d...

8 days ago | 0

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Answered
Help with MATLAB code on low rank assumption using nuclear norm using CVX and Matlab!
I believe the issue is with calling Xe(:) instead of Xe. Others who know more might be able to correct me, but my working theory...

9 days ago | 0

Answered
Error in importing the matlab ouput to excel file
It looks like you're trying to output a symbolic variable to excel, which I don't think is allowed. Try converting to double fir...

9 days ago | 0

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multiple matrix step through for loop
Instead of doing a loop you can just do a bit of logic to the arrays. risk = ones(length(age),1,1); risk(age>=75&bmi>=50&smoke...

10 days ago | 0

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Answered
For loop to repeat the loop with different set of value
You are seeing only the final results because you do not have your output variables indexed. for i=1:length(SNRDB) f...

11 months ago | 0

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Read every file in a folder
To get information on all the files in a folder use dir, or getdir. From there, just loop through the elements of the dir output...

11 months ago | 0

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Store values in an array from loop
I'm not sure what you mean by printing the 'name' associated to a data set, but there are my modifications to what you have setu...

11 months ago | 0

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Answered
i need some help
If I'm understanding what you're trying to do, you're only missing parentheses. >> n = 10; >> p(10) = 2; >> p(n) p(n) = ...

12 months ago | 0

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plot graphic with different color
If you're using the plot command, it is relatively easy to define a different color for a plot. Setting the condition where this...

12 months ago | 0

Answered
How to map and plot each y coordinate in a y coordinate array with each coordinate in a x coordinate array??
plot(X,Y) Was there something more to your question that I didn't understand?

12 months ago | 0

Answered
Adding to a vector after each step of a for loop.
You need to specify the index of the element you want to replace. for i = 1:1000; steps(i) = i; end Realistically though...

12 months ago | 0

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Answered
Hello! Can you help me with this?
It seems to me like you're totally overcomplicating this. Let me know if I'm interpretting the steps of your code correctly. Th...

1 year ago | 0

Answered
Access previous iteration in while loop to derive stopping criterion for differential equation correction-prediction method
In MATLAB, you cannot access the previous iteration of a loop directly. If you want to utilize that information you need to eith...

1 year ago | 0

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Answered
How can remove Excel column by MATLAB
The simplest way is to load the excel file with xlsread, then write the data back with only the desired columns using xlswrite. ...

1 year ago | 0

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Answered
Plotting a matrix in a for loop.
With MATLAB you don't really want to perform the plot inside the loop in this case. Just save your results in a matrix and plot ...

1 year ago | 1

Answered
How to save more than the last matrix in a for cycle
You need to index Sigma_elem. Sigma_elem(:,:,i,N)=EPSM(N,1:6).*e_mat/0.6; % Or something similar

1 year ago | 0

Answered
Plotting a 3-D Matrix, but only for some points
I would suggest using scatter3 to make the actual plot. I would suggest using something like find to identify the locations of t...

1 year ago | 0

Answered
how to calculate how many rows are having numeric values in a particular cell of an excel sheet data.
Read the file with xlsread, filter the NaN values, then determine the number of the remaining values. numnumerics = sum(~isnan(...

1 year ago | 0

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Answered
Extract and code gender string as number using if loop
Just to clarify, you have 'gender' as two separate variables, once as a variable called 'gender' which will have a numeric assig...

1 year ago | 0

Answered
overly convoluted elseif condition
You can replace all of them with a single statement and indexing. if x>=1 & x<=4 y = p(x); else y = 1; end

1 year ago | 0

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Answered
How to increment matrix row only inside a nested for loop?
The solution is indexing. You can do math in your index if you need to. x((i-1)*5+j) = i*j;

1 year ago | 0

Answered
filtering data with a for loop and plot only filtered data
This can be done much more simply with logic indexing. quer = meas.ay.data; quer = quer(quer > 1.5 | quer < -1.5); plot(quer)...

1 year ago | 1

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Answered
Replace values in collumns
You can just index your matrix to reorder it, assuming all of the columns are the same type of data (i.e. all of column 6 is z2,...

1 year ago | 0

Answered
2 variable for-loop
The issue is with your definition of test. Nested for loops are totally fine. test(:,ss)=TKE_dave(:,ss); On your last loop te...

1 year ago | 1

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Answered
Error Unable to perform assignment because dot indexing is not supported for variables of this type.
You are receiving the error because you have already defined the class of the first level as a character. In order to add a seco...

1 year ago | 0

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Answered
Changing Variable in matrix
Why are you originally defining A as A = [a b c]? This isn't very common or efficient matlab usage. I would suggest starting wit...

1 year ago | 0

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