Community Profile

photo

per isakson


Last seen: Today

KTH

2.265 total contributions since 2010

Contact

per isakson's Badges

  • Revival Level 3
  • Ace
  • 36 Month Streak
  • Leader
  • Speed Demon
  • Promoter
  • Personal Best Downloads Level 2
  • Editor's Pick
  • First Review
  • 5-Star Galaxy Level 4
  • First Submission
  • Thankful Level 3
  • Knowledgeable Level 4
  • First Answer
  • Commenter

View all

Contributions in
View by

Answered
Plotting datetime from dataset
You may specify the format of the time axis in the plot command. See the documentation of plot() %% Create some data that resa...

1 día ago | 0

Answered
Rounding date time to nearest half hour wihtin a table
An alternate way %% A slightly modified example from the documentation MeasurementTime = datetime({'2015-12-18 08:03:05';'2015...

2 días ago | 0

| accepted

Answered
How to count the number of times I called a function (using the command line)
You could replace counter=0; %Initializing counter by persistent counter if isempty( counter ) counter=0; %Initializin...

4 días ago | 0

| accepted

Answered
Is it possible to have an array of function handles?
The short answer is no. However, it's possible to store function handles in a cell array. f = cell(2,1); f{1} = y1prime; f{2...

6 días ago | 0

Answered
This statement is not inside any function. (It follows the END that terminates the definition of the function "extract_tiff".)
There are two end at the end of the function. k=k+1; end end Remove one of them

6 días ago | 0

Answered
Can I control filter command?
Yes, filter() is possible. Try y = filter( 1, [1,1], x );

7 días ago | 0

| accepted

Answered
Creating a row vector of noisy data.
A naive code noise = 2.0 * randn(1,100); noise = noise .* (2.0./std(noise)); std( noise ) ans = 2 a bit closer...

8 días ago | 0

Answered
Extracting column from text file
This is a fixed-width text file. The documentation includes a good description on how to read fixed-width text files. See fi...

9 días ago | 0

| accepted

Answered
Sorting numbers according to elements of an array
Without comment: >> [~,ix]=min(abs(SORTING-input)) ix = 1 >> SORTING(ix) ans = 3 >> >> [~,ix]=min(abs(SORTING...

9 días ago | 1

Answered
how to debugg the error : size input must be integers
"how to debug" Before trying to fix the problem see: Debug a MATLAB Program Next set Pause on Errors and run Section_...

9 días ago | 0

Answered
Does matlab create pointers to objects or create new copies?
See Comparison of Handle and Value Classes

9 días ago | 1

| accepted

Answered
Namespace management for packages+sub-packages
Yes, that's the way it is. And sprinkle the code with import doesn't really help. Nevertheless, I find packages useful. A bett...

10 días ago | 0

Answered
Mean command gives wrong answer
Analyze this %% x=[1,2,3,4,5,6,7,8,9,10,11,12]; % x values y=[15,120,2,30,40,150,60,170,80,9,15,1000]; % y values %% idx1 =...

11 días ago | 1

| accepted

Answered
Are enum-comparisons slow in MATLAB?
Indeed, enumerations make slow code. This is an anecdote about a code based on enumeration that proved useless because of poor...

11 días ago | 0

Answered
Basic queries Matlab (vectors, indexing, construct matrices in a specific form)
Exercise 1 and 2 "[...] however it confuses me the way the question is written!" Agree; the very same vector has three differe...

13 días ago | 0

| accepted

Answered
keep element greater than immediate previous element
An alternative %% x = [1 2 3 4 3 2 3 4 6 8 5 5 6 8.5 9 11 12 ]; %% dx = 1; while not( isempty( dx ) ) dx = fin...

14 días ago | 1

Answered
How to reduce computation time
On R2018b and a new vanilla PC I found a significant decrease in computation time by replacing quad2d() by integral2() (with the...

14 días ago | 1

Answered
How can I write a variable which datatype is a string in netcdf file
Most likely, the space you specified for the variable calibration_procedure in the nc-file, i.e. 'Dimensions',{'hydrophone_cou...

14 días ago | 0

| accepted

Answered
constructing a difficult large matrix
Here are three functions, two of which are based on the answer of David Goodmanson. I think all of them are fast enough. However...

15 días ago | 1

Answered
Randomly convert exact number of 1 to 0 in binary matrix
Try %% x = [ 0 1 0 1 0 1 1 1 1]; %% ix_one = find( x == 1 ); ix_set_zero = randi( numel(ix_one), 1,2 ); x( ...

16 días ago | 0

| accepted

Answered
number permutate without permutation
Steps to find a substitute for perms without perms Lookup perms in the documenttion, perms, All possible permutations See "Se...

16 días ago | 0

Answered
is 2GB RAM ok for MATLAB 2020 ?
Yes, you don't need to install Polyspace, but plain Matlab requires a minimum of 4GB. See System Requirements for MATLAB R2020a

17 días ago | 0

| accepted

Answered
Storing data from a loop
Pre-allocate Y1 and Y2 Assign to elements of Y1 and Y2 Do not change the loop counter, ii, in the loop The documentation say...

17 días ago | 0

Answered
I am having problems with my homework:Write a function called valid_date that takes three positive integer scalar inputs year, month, day....
Replace (rem(year,4)==0 && rem(year,100)~=0) || (rem(year,400)==0 && rem(year,100)~=0) by (rem(year,4)==0 && rem(year,100)~=...

18 días ago | 0

Answered
cellfun vs. varfun applied to column of table
This works, but may contain more code than you hoped for. %% T = table({'147956, 154414'; '1, 7439'; '93053, 101815'; '50151, ...

18 días ago | 1

Answered
OPP using any algorithm
Did you check YALMIP and MATPOWER ?

19 días ago | 0

Answered
Continuing an input function onto another line
The documentation says; The start and end quotation marks for a character vector must appear on the same line. For example, thi...

20 días ago | 0

Answered
export codes written in editor into word
See Bring along your syntax highlighted code and M2HTML: Documentation System for MATLAB in HTML

21 días ago | 1

| accepted

Answered
Transaction Data in HTML file
This is a start %% sad = dir( 'd:\m\cssm\transData*.txt' ); len = length( sad ); out = cell( len, 2 ); for jj = 1 : len ...

23 días ago | 0

| accepted

Answered
Textscan with '@' as delimiter
I've reproduced your result on R2018b. The result is according to the textscan documentation - I think. out1 is a cell array of...

25 días ago | 0

| accepted

Load more