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Question
Slow readtable and low disk activity
Hi, I am doing a readtable() on a big file. However, I don't see much of a disk activity. The files loads but at a much slowe...
plus de 7 ans il y a | 1 réponse | 0
1
réponseA soumis
Clip Raster By Polygon
Clips a raster by a polygon and extracts certain statistics
presque 9 ans il y a | 2 téléchargements |
gradient descent with noisy data
Try one of the optimization methods in the global optimization toolbox, such as <https://www.mathworks.com/help/gads/particle-sw...
plus de 9 ans il y a | 0
How to create finer mesh with material distributions?
You can use <https://www.mathworks.com/help/images/ref/imresize.html imresize()>. Something like this should work. % Initia...
plus de 9 ans il y a | 0
| A accepté
Perform mathematical operation on matching values
One way is this: mask = (A(:,2)==21); % performing the operation and storing it back in A: % mask is used twice, ...
plus de 9 ans il y a | 0
| A accepté
How to change integer format
fprintf('%0.2d\n',2) 02 fprintf('%0.2d\n',3) 03 fprintf('%0.4d\n',3) 0003
plus de 9 ans il y a | 0
| A accepté
Question
Where should I report a bug that I find in MATLAB?
Hi, If I think I have found a bug in MATLAB where should I report it? Here is one in Mapping Toolbox: Let's Say I have ...
plus de 9 ans il y a | 3 réponses | 1
3
réponsesQuestion
Issue with launching Parallel Workers when using TORQUE or PBS
Hi, I am attaching the full output of MATLAB when trying to set useParallel option of GA to true. This been causing some t...
plus de 9 ans il y a | 1 réponse | 0
1
réponsewhat is the average i have data like
% I assume you have your data in a row x = [1 1.2 1 1.3 1 1.5 3 1.4 3 1.6 3 1.8 3 1.9 4 1.2 4 1.7 4 0.9]; % change i...
plus de 9 ans il y a | 1
| A accepté
A résolu
Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1
plus de 9 ans il y a
Reading data from a multiple csv's in a folder and read until end of a specific column and not starting from top of the file
could you upload a sample CSV file! note that *pos* and *time* are both overwritten in each loop. So what's their purpose? ...
plus de 9 ans il y a | 0
| A accepté
How do I multiply matrices using multiple GPU?
Well, for the start, XGs_C and XG_C are both Cell arrays. <http://www.mathworks.com/help/distcomp/gputimeit.html gputimeit()> ac...
plus de 9 ans il y a | 1
| A accepté
Question
Finally Clause in Try-Catch
Just making sure MATLAB Try/Catch does not have the "finally" block? Correct? I am simulating the behavior using somethin...
presque 10 ans il y a | 2 réponses | 1
2
réponsesAll possible Combinations and equation analysis
a=[1,2]; b=[2,3]; c=[1,4]; % Getting all the combinations [x1,x2,x3]=ndgrid(a,b,c); % reshaping them as...
environ 10 ans il y a | 1
| A accepté
Find the actual distances in an image.
Similar approach to this should work: I=imread('P3290337.JPG'); I=padarray(I,[1 1 0],0); thresh = 15; mask = ~(I(:...
environ 10 ans il y a | 0
| A accepté
Question
Possible bug in struct2table()
When I try to convert a single structure to array using <http://www.mathworks.com/help/matlab/ref/struct2table.html struct2table...
environ 10 ans il y a | 2 réponses | 0
2
réponsesHow can I transform 3-dimensional netCDF data to a 2-dimensional table efficiently
I think you are better off keeping it 3D as it is. Here is how you can calculate some of the stuff you asked very easilly. As...
plus de 10 ans il y a | 1
| A accepté
what is different between fget1 and fread ?
I don't think enviread is a function provided by mathworks. It appears it is something that users have provided. Try <http://...
plus de 10 ans il y a | 0
| A accepté
Creating variable averaged over two strata
first convert your date so that you get year and month separately. If you have the date as a string you can use <http://www.math...
plus de 10 ans il y a | 0
| A accepté
how can I delete the related raw in B?
A=[3,0.003;1,0.025;2,0.03] A = 3 0.003 1 0.025 2 0.03 B=[1,75;2,102;3,63] B = 1 ...
plus de 10 ans il y a | 0
| A accepté
If A is 4 banded 14 X 14 matrix and B= 14 X 1 matrix. Then how can i solve the system of equation for X where AX=B. A= 1 -2 1 8 -8 3 1 8 -8 3 1 8 -8 3 . .. ... ....... 1 8 -8 3 1 7 1
This is all needed X=A\B
plus de 10 ans il y a | 0
| A accepté
Question
Unknown number of output variables
There are some functions that support variable number of output variables. For example, <http://www.mathworks.com/help/matlab/re...
plus de 10 ans il y a | 1 réponse | 0
1
réponseFor loop to matrix
Don't need a for loop. Do it like this: V1=49:2:99; V2=zeros(1,numel(V1)); V3=50*ones(1,numel(V1)); b=[V1;V2;V...
plus de 10 ans il y a | 2
| A accepté
different set of subplot with loop
for i=1:3 figure for j=1:6 %calculation subplot(2,3,j); %plot commands end end
plus de 10 ans il y a | 0
| A accepté
Read specific 2D matrix from 3D matrix variable from netCDF....
To read a matrix of mXn with third dimension being at r \in [1,p] do this: data = netcdf.getVar(ncid,varid,[1,1,r],[m n 1])...
plus de 10 ans il y a | 1
| A accepté
Running two functions in parallel of which one would like to use parfor
Use non-blocking <http://www.mathworks.com/help/distcomp/parfeval.html parfeval()>.
plus de 10 ans il y a | 3
| A accepté
Is there an alternative to parfor?
Couple of notes here: *NOTE 1* instead of only parallelizing the inner for-loop you can parallelize all of them as follow: ...
plus de 10 ans il y a | 0
| A accepté
Adding a second for loop to create different matrices
Yes, there is a way; but (really really) not recommended: (why not, refer to Stephens answer) But if you insist, here is how you...
plus de 10 ans il y a | 0
| A accepté
how to obtain a vector contains a mean of other vector
v=[26 196 27 196 28 196]; v1=[mean(v(1:2:end)) mean(v(2:2:end))] v1 = 27 196 You really need to have...
plus de 10 ans il y a | 0
| A accepté
