per isakson

KTH

Last seen: Today | Active since 2010

Statistics

All

Content Feed

Answered
Is it possible to rename columns in a table?
You can rename the variables in a table by using either the "Properties.VariableNames" property or the "renamevars" function. (I...

22 days ago | 33

| accepted

Answered
Separating data into one-second intervals, and finding the maximum data in each interval
%% load data num = load('Green6000X.csv'); %% split data into chunks of one second N = ceil( num(end,1) ); chunk = cell( ...

29 days ago | 0

| accepted

Answered
Extract files with the same names in subfolders and save them into a new folder with a different name
%% myFolder = 'current folder path'; filePattern = fullfile(myFolder,'**','*.png'); theFiles = dir(filePattern); numFiles ...

1 month ago | 0

| accepted

Answered
comparison of two column vectors
An example %% v1 = rand( 6,1 ); v2 = rand( 6,1 ); %% v1 > v2 This result tells us that the first, fourth, fifth and sixth ...

1 month ago | 0

Answered
How to set the value of a variable in one function from another?
Modify the function so that f1 takes n as an input argument function [n,x,y] = f1( n ) n; //code that does stuff with n end ...

1 month ago | 0

| accepted

Answered
Error with readtable function
I assume that the entire text file and the result fits in your RAM. "huge" means different things to different people. This fun...

2 months ago | 0

| accepted

Answered
How to delete the words/characters from a .txt file?
Another way. See documentation on textscan(), formatSpec — Format of the data fields fid = fopen( 'loadcell_data.txt' ); cac ...

2 months ago | 2

Answered
How do you vertically concatenate the rows of a cell array consisting of vectors of numbers?
Example m = magic(3); m = [m,m,m]; cac = num2cell(m); % sample data arrayfun( @(ix) vertcat(cac{:,ix}), [1:9], 'uni',false ...

2 months ago | 0

| accepted

Answered
Help with the below error
Example A = 17; % A is a scalar A(2) % there is no element with index 2

2 months ago | 1

| accepted

Answered
MATLAB Answers Wish-list #5 (and bug reports)
I noticed a minor issue with hyperlink. Clicking the link (marked with yellow below) in my Content Feed takes me to the wrong ...

2 months ago | 0

Answered
Why do I get invalid expression error for this piece of code?
Missing comma and a semicolon % disp(['The number of days between bdate,'and, 'edate'; leapyr]); % % ...

2 months ago | 1

Answered
How to subtract contents of cells in cell array?
The problem is that baskets_xyz is a cell array of cell arrays. Your cellfun statements requires a cell array of double (numeric...

3 months ago | 0

| accepted

Answered
Class : Error while assigning variables in constructor
How did you call the constructor? I added a few line to make your code a syntactically correct class. And tested the constructo...

3 months ago | 0

Answered
How to add header to cell matrix
No, however that depends on what you require from the "header". Is this useful? If not see table - Table array with named variab...

3 months ago | 0

| accepted

Answered
MATLAB Answers Wish-list #5 (and bug reports)
A minor issue By mistake I accepted an old question of mine. I realized my mistake an unaccepted the question. However, in my "...

4 months ago | 1

Answered
Class method is 'call by value' function, isn't it?
See Comparison of Handle and Value Classes. Your myClass is a value class. "It tells me that first input arg must be instance...

4 months ago | 0

Answered
Class property automatically propagated to old class instances
See Comparison of Handle and Value Classes Your exampleClass is a value class. However, the behavior you describe is more like ...

4 months ago | 0

| accepted

Answered
Index in position 1 exceeds array bounds. Index must not exceed 1.
What is your intention with this assignment? %% Initial condition T(:,:) = 293; % initial temperature (K) Matlab mak...

4 months ago | 0

Answered
Run a large number of iterations without the use of a for loop
Preallocating the variable t will improve speed a lot. Something like t = nan( 1536256, 1 ); t(1) = rf-r0; ... t(i) = rf-...

4 months ago | 1

Answered
How to vectorize the function?
Read Array vs. Matrix Operations. With scalars the two produce the same result, but not with vectors and arrays. The second se...

6 months ago | 1

| accepted

Answered
How am I suppose to fix this error. I am trying to run the code in order to get a stress vs strain plot and find the value described in the script.
This script runs without throwing errors; the syntax is correct. I assigned values to some undefined variables, lo, m, x, y. C...

6 months ago | 0

| accepted

Answered
Extracting the numeric part from a cell
Try >> extractBetween( "injection-0:94582)", ":", ")" ) ans = "94582"

6 months ago | 1

Answered
'line' returns number instead of handle inside a loop of a class method
I have reproduced your findings on R2018b. The numerical "handles" are the old type, pre R2014b. I failed to find an explanati...

6 months ago | 0

Answered
Error using for loop to delete empty cell array elements
Replace for i=1:numel(temp_routes_log) by for i = numel(temp_routes_log) : -1 : 1 % loop from last to first element OR if r...

7 months ago | 0

| accepted

Answered
how to find the immediate date before in one column based on another column using find function?
Assumptions: the two column vectors are sorted a specific date in the first vector may exist in the second vector more than o...

7 months ago | 0

| accepted

Answered
Whitespace Delimited Textfile, NaN results?
The problem is caused by 'Delimiter',' ' in datacell = textscan(fid,'%f%f%f%f', 'Delimiter',' ', 'CollectOutput', 1); in co...

7 months ago | 1

| accepted

Answered
empty array size is stuck on 1x3
Try replace fscanf(fileID,'\n\n\n\n\n\n\n\n\n\n\n\n\n\n'); by for jj = 1 : 14 fgetl( fileID ); end fscanf(fileID,'\n\n...

7 months ago | 0

Answered
Please help me to look at the code. Thx
This returns a numerical result, but it's not an integer. fun = @(x) exp(-x.^2./2); int = gausslegendre( 0, 2, fun, 1 ) func...

7 months ago | 0

| accepted

Answered
I have an invalid use of operator error
I have modified your function to avoid the recursive call of the function. atmos function [T,p,rho] = atmos() h = 0:0.2:20...

7 months ago | 1

| accepted

Answered
Trouble using the system command with special characters
You try to call system() with a sequence of several input arguments and assumes that system() shall join these arguments to the ...

7 months ago | 0