Community Profile

photo

per isakson


KTH

2 071 total contributions since 2010

Contact

per isakson's Badges

  • Revival Level 3
  • Ace
  • 36 Month Streak
  • Thankful Level 3
  • Knowledgeable Level 4
  • First Answer
  • Leader
  • Speed Demon
  • Promoter
  • Commenter
  • Solver

View details...

Contributions in
View by

Answered
Previously accessible file is now inaccessible
You need to close the file after reading, add fclose( fileID ) after filedata = textscan(fileID, '%s %s %s %s %s %s %s %s')...

environ 23 heures ago | 0

| accepted

Answered
How to convert all the rows containing char values to numbers in a table without for loop?
Replacing str2num by str2double might help. str2num uses eval(), which is slow. str2double takes arrays as input. %% cac =...

3 jours ago | 0

Answered
How to extract a vector from a matrix and save in workspace?
"can I use them in a loop using their names" NO but you can loop over the columns of the matrix for jj = 1 : size( M, 1 ) ...

3 jours ago | 0

| accepted

Answered
Why eval seems to be faster than other alternatives in this example?!
Testing is tricky >> Untitled5 Elapsed time is 0.167926 seconds. Elapsed time is 0.007457 seconds. Elapsed time is 0.010043...

3 jours ago | 0

| accepted

Answered
how do I substitute all negative values in a vector with a random number between 0 and 2
One way >> Y = randi( [-4,4], 1,12 ); % sample vector >> isneg = Y < 0; >> Y( isneg ) = 2*rand( 1, sum(isneg) ) Y = Co...

3 jours ago | 0

Answered
Alternative to using global for a very large array
"unjustified waste of memory" Matlab is smarter than that, see Avoid Unnecessary Copies of Data. If LUT is look-up-table a...

3 jours ago | 0

| accepted

Answered
Integer check
function isf = isflint( m ) % floating double only % % http://www.mathworks.com/company/newsletters/news_notes/pd...

4 jours ago | 0

Answered
Is vaderSentimentScores available in R2019a
No, vaderSentimentScores was Introduced in R2019b. See bottom of the page.

5 jours ago | 0

| accepted

Answered
Regexp lookbehind and lineanchors
"My intent is to match 'c' that is preceded by the beginning of a line and zero or more white character." In the character arra...

5 jours ago | 0

| accepted

Answered
How to use a percentage number time with a matrix
matrix * (100-10)/100

5 jours ago | 0

| accepted

Answered
Matrix Dimensions Must Agree
Is this a copy&paste error? W=imread('copyright1.png'); I=imresize(I,[300 300]); Replacing the line by W=imread('copyright1....

5 jours ago | 0

Answered
Opening R2018b .m files in R2019b
Most likely the reason is that your search path of the R2018b installation is not carried over to the R2019b installation. See S...

5 jours ago | 0

Answered
selecting rows from C with associated values in D, while using A and B values as references to produce E and F matrices
The script %% ixe = [1,4,7]; E = cat( 2, D(ixe), C(ixe,:) ); ixf = setdiff( [1:7], ixe ); F = cat( 2, D(ixf), C(ixf,:) ); ...

6 jours ago | 0

Answered
Append rows to .mat file
See save(filename,variables,'-append') matfile Access and change variables directly in MAT-files, without loading into ...

7 jours ago | 0

Answered
How to import textdata & data from Excel spreadsheet into Struct, using for loop?
What is the size of SBOB ? The for-loop % % Let this be for BOB % for i = [12:14,44:60,71:82] % filename1{i} = sprintf('...

7 jours ago | 0

Answered
Method to GREEDILY select an optional text using regular expressions?
Try %% nfolders = { 'UD_epoch' 'UD_Epoch' 'epoch' 'Epoch' 'U...

7 jours ago | 1

Answered
Calculating storage required to store any certain array(nxn) in the .Mat file ?
Try whos -file matlab.mat See whos, List variables in workspace, with sizes and types

8 jours ago | 0

Answered
Assigning letters to numbers
"assign letters to numbers but in reverse (A = 26, B=25, etc)" Why not start by making a function that takes letters and return...

11 jours ago | 0

Answered
Variable highlighting isn't working
I guess the problem is with the meaning of "Variables with shared scope". See Check Variable Scope in Editor The gui you refer ...

12 jours ago | 1

Answered
Where should we install third-party toolboxes under Windows?
That depends Are you connected to a local network? Do you have a your own drive on a local server? Are the local workstation...

14 jours ago | 1

Answered
Call function by path or namespace?
That's a good question. These two Matlab blogs Simple Namespaces and Brilliant Function Handles A conversation about managing ...

17 jours ago | 0

| accepted

Answered
What frustrates you about MATLAB?
Background While experimenting with a function, which I had downloaded from FEX, I encountered the error No such file or dire...

environ un mois ago | 0

Answered
What's the best way to open and read a .out file in MATLAB?
If the file contains columns of data, you may want to try the interactive tool Import Data Notice that this tool can generat...

environ un mois ago | 0

Answered
Is there a way to continue operation during input()?
Something like %% a script named cssm.m while true user_input = waitinput( 'prompt: ', 5, 's' ); if isnan( user_inp...

environ un mois ago | 0

Answered
how to re-assign variable within for loop
A long shot. Replace table=[data1;data2] by if i == 0 table = data1; end table = [table;data2]; %#ok<AGROW> data1 = ...

environ un mois ago | 0

| accepted

Answered
How to use textscan on a cell array without a loop?
Am I on the right track? Run %% mystruct.out = { '%ACCDA,50,123.99,W,07512.001,E,2,11,2.2,1002.2,Z,,,,*22' ...

environ un mois ago | 1

Answered
How to replace values above a given percentile by nans
Ignore the NaNs explicitely when calculating the percentile. Try %% % Table with nan t = array2table(vertcat(horzcat([1:1000...

environ un mois ago | 0

Answered
how to access abstract class in matlab
I'm not sure, I exactly understand what you mean. However, I try "how can I access this abstract class" You cannot "access" an...

environ un mois ago | 0

| accepted

Answered
Updation of Cell Array
Is something like this what you are looking for? I don't quite understand what you tried. Try this code %% Sample data cell...

environ un mois ago | 0

| accepted

Answered
how to assign multiple strings to single variable
Try >> jan = arrayfun( @(num) sprintf('jan_%4d',num), (1958:2018), 'uni',false ); >> jan(1:3) ans = 1×3 cell array {'...

environ 2 mois ago | 0

| accepted

Load more