Community Profile

photo

Sindar


Last seen: 5 days ago

University of Colorado Boulder

206 total contributions since 2018

Contact

Sindar's Badges

  • 6 Month Streak
  • Revival Level 2
  • Introduction to MATLAB Master
  • Community Group Solver
  • Solver
  • Knowledgeable Level 3
  • First Answer

View details...

Contributions in
View by

Answered
Aquire random sampling of plot values
Assuming your two datasets share x values and are not absurdly massive, this direct method is probably faster % generate some s...

15 days ago | 0

Answered
How is parfor time taken is larger than that by normal for loop ?
Best guess: you don't preallocate y, nor clear it. So, the parfor needs to expand the vector constantly while the for is simply ...

19 days ago | 0

Answered
How to obtain hourly average from several years of data
G = groupsummary(struct2table(WSHelp),'DateTime','hour','mean');

19 days ago | 0

| accepted

Answered
how to split these char format into lines
ed: Matlab has a built-in function w_split = splitlines(w); Here's a trick: I don't know what the delimiter between lines ...

19 days ago | 0

| accepted

Answered
Adding fields and values to a structure iteratively
n=3; priors=struct(); for ind=1:n priors.("prior"+ind) = makedist('uniform',-1,1); end

19 days ago | 0

| accepted

Answered
How to copy data from multiple .mat files into single .mat file?
Assuming absolutely nothing about your data, this should dump the saved data into a single matfile (one variable per loaded file...

19 days ago | 0

Answered
How to create multiple plots for time series data?
While you may want to think about a cleaner way of dealing with the plot (e.g., plotting in the same figure window and saving), ...

30 days ago | 0

| accepted

Answered
Finite difference scheme used in 'CURL' function?
You can actually see the full code using edit curl it looks like everything is based on gradient, which appears to use a 2-poi...

30 days ago | 0

| accepted

Answered
Need help writing code to attach date (1-365) from 30 years of data to the actual data needed to be processed. Trying to group into months.
edit: final code for this case: "What I am working with is a 842,382x3 matrix where the first column is a repetition of numbers...

30 days ago | 0

| accepted

Answered
Using randsample on a matrix of weights
it doesn't seem like the assignment statement has any reason to be in the loop. Pulling it out may save a decent amount of time ...

1 month ago | 0

| accepted

Answered
Multiply local values of a matrix with a vector
I'm not quite clear on which columns you want to change, but take a look at this and see if it makes sense: % sample matrix >>...

1 month ago | 0

| accepted

Answered
Convert several columns char matrix into one column char matrix
join? >> tmp={'a' 'b' 'c' ; 'd' 'e' 'f'} tmp = 2×3 cell 'a' 'b' 'c' 'd' 'e' ...

1 month ago | 0

Answered
How to make a structure to be input of a function and then its updated version to be output of the function?
function new_struct = update_struct(old_struct,add_field, add_val) new_struct = old_struct; new_struct.(add_field) = a...

1 month ago | 0

| accepted

Answered
are there GPU settings in matlab?
Most code will not be run on the GPU without adjustment There are guides here and it looks pretty easy for many applications:...

1 month ago | 0

Answered
how can i solve this error?and how can i get wavelet toolbox ?
Check here whether you have a license for it, or need to buy: https://www.mathworks.com/products/wavelet.html?s_tid=srchtitle#tr...

1 month ago | 0

Answered
how to choose a random excel cell in a certain coloum
If you have R2019a or above, use readmatrix. But, the issue is that you are mixing up passing a variable and a string. It happ...

1 month ago | 0

Answered
Save data to Excel without overlapping
Check out writematrix: https://www.mathworks.com/help/matlab/ref/writematrix.html#mw_f36f6f84-e6bd-4749-8957-a88b07036116 Somet...

1 month ago | 0

| accepted

Answered
how to make label y axis specific?
% if you want a label at 0, make sure to include it in your limits ylim([0 1000]) yticks([0 500 1000])

1 month ago | 0

Answered
Converting nested "summary" structure to table
Here's the loop version. There may be another way, but I didn't have any luck fighting with Matlab's tricky multiple-cell return...

1 month ago | 0

| accepted

Answered
How to find the non-zero minimum of a subset of matrix elements
The issue is that logical indexing doesn't work when you are checking against a subset of the matrix: >> A = [1 2 3 4; 2 0 1 5;...

1 month ago | 0

| accepted

Answered
Changing the number of xticks on heatmat (without changing the data)
Try: xt=xticks; xticks(xt(1:10:end)) If that doesn't work, it sounds like ax = gca; ax.XDisplayData = [date(1:10:end)]; % ...

1 month ago | 1

Answered
Extract row data from a table as a result of intervals (boundaries) being called in from a different structure
Does this do it? % generate some random data 0-1 DATA = rand(328,338); % set the lower and upper bounds to extract as 0.25 an...

2 months ago | 0

| accepted

Answered
Discrete fourier transform (DFT) Question
Check out this example from the angle documentation: https://www.mathworks.com/help/matlab/ref/angle.html#mw_9b727746-7db3-4b26-...

2 months ago | 0

Answered
how to load a matfile and access & process its content.
% create a structure with field 'somefield' containing the desired filename mystruct = struct('somefield','execution') % creat...

2 months ago | 1

Answered
Deleting/selecting and subsetting specific slices in a multi-dimensional array
This may not be the most efficient way, but you can take that 2D logical array and rebuild your 3D logical array: subset_3D = a...

2 months ago | 0

| accepted

Answered
what is the physical meaning of getting peak of higher amplitude in frequency domain by using FFT??
Assuming you kept track of normalization correctly(*), yes, a higher amplitude of the fft corresponds to higher signal strength ...

3 months ago | 0

| accepted

Answered
Can matlab work with NVIDIA 2gb Graphics card?
It depends on what you're trying to do, but I would think you should be fine. I worked for years on a 8 GB RAM / 1 GB GPU machin...

3 months ago | 0

| accepted

Answered
Does FFT output vary if I split a signal into windowed time segments instead of using a Hanning Window?
A few things to consider: more time-domain elements --> finer frequency domain spacing. treating the three cuts the same will ...

3 months ago | 0

| accepted

Answered
Placing a structure within a map container - or is there a different, more suitable way to store this type of data?
You can give tables row names so they are indexible that way: keys = {'Jan','Feb','Mar'}; n_keys = length(keys); data_table =...

3 months ago | 2

Answered
Matlab Tasks from proffesor
First one: define symbolic variables write out the expression in linear math notation ask Matlab to rewrite the equation as s...

3 months ago | 0

| accepted

Load more