per isakson

KTH

Last seen: 1 day ago | Active since 2010

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"ismethod" on restricted methods
This works function flag = CheckForMethod1(anotherClass) mc = metaclass( anotherClass ); flag = ismember( 'method1', ...

29 days ago | 1

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Property assignment is not allowed when the object is empty. Use subscripted assignment to create an array element.
Always include the full error message in the your question. I don't have the data acquisition toolbox. However, the error mess...

4 months ago | 0

Answered
How can I programmatically change all my matlab code to use "datetime" rather than "datestr(now)" ?
By mistake, I answer the general question: "Can I do this [replace datestr by datetime] programatically?". IMHO: It cannot be...

4 months ago | 0

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Answered
Which MATLAB GUI framework to use?
Caveats: I have not used the new GUI framework in any serious way Yes “it depends”. This answer suggests how I would approach...

6 months ago | 0

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Answered
Data extraction from txt file with changing number of columns
The file All-In-19-QUICK_EVAL.txt contains 73 sections. Each section starts with two consequtive empty rows followed by in th...

7 months ago | 0

Answered
Compare table variables with input list and replace missing vars with NA
This should work with 2017b. %% fid = fopen( 'output.csv', 'rt' ); output_csv = textscan( fid, '%s%*f', 'Headerlines',1...

7 months ago | 0

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How to find a user based on full name and eight digit number
Background: I promised to answer a question and asked the user to include a "reference" to my name - like . We used the Communit...

8 months ago | 1 answer | 0

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Extract data from csv with header ond footer
I've replaced "data" in your file by "3.14" and I've skipped the the two column header lines, because they are weird. Here is...

8 months ago | 0

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Answered
Find pattern in vector while ignoring/skipping certain indices
I assume it's a vector of integers. Steve Amphlett showed this trick at comp.soft-sys.matlab twenty years ago. %% Create sa...

8 months ago | 0

Answered
How to use extractBetween command?
startStr and endStr must be in the same row (i.e. in a contiguous sequence of characters). %% chr = fileread('input.txt'); m...

8 months ago | 0

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Answered
Changing the content of an object that is contained with an array of objects
The behavior you see is the way Matlab is designed to work. See Properties Containing Objects and Property Default Values. The k...

8 months ago | 0

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...

9 months ago | 35

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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( ...

10 months ago | 0

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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 ...

10 months ago | 0

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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 ...

10 months 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 ...

10 months ago | 0

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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...

10 months ago | 0

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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 ...

10 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 ...

10 months ago | 0

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

10 months ago | 1

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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 ...

10 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]); % % ...

11 months ago | 1

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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...

11 months ago | 0

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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...

11 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...

12 months ago | 0

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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 "...

1 year 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...

1 year 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 ...

1 year ago | 0

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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...

1 year 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-...

1 year ago | 1

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