Stephen23

Active since 2014

Suspensa Vix Via Fit

Statistics

All

View badges

Content Feed

Answered
sorting data with specific
A = [5,4,3,2,1;6,7,8,9,0]; B = sortrows(A.').'

1 hour ago | 0

| accepted

Answered
How to properly create for loop with if statement
The simple and efficient approach: L = -180:20:180 L = mod(L,360)

2 hours ago | 0

Answered
use unstack to reshape table with dummy variable (edited: alternative crosstab method)
Using UNSTACK is quite a neat solution because it will automatically pad different-length data to the same number of columns, ad...

14 hours ago | 0

Answered
How can I pass a function name into another function?
The functions that you nested inside TESFUN are only visible within TESTFUN: https://www.mathworks.com/help/matlab/matlab_prog/...

3 days ago | 0

| accepted

Answered
How can I create a matrix of size nxn (user input) where all outside numbers are 1, incrementally decreasing by 1 each layer the matrix goes in?
N = 5; V = min(1:N,N:-1:1); M = min(V,V.')

3 days ago | 2

Answered
How to merge new variables and append new rows at the same time (when synchronizing timetables)?
R1 = array2timetable(randi([36 40],5,2),'RowTimes',dateshift(datetime('today'),'dayofweek','Friday',-5:-1),'VariableNames',["x1"...

3 days ago | 0

| accepted

Answered
Undefined function 'extractfield' for input arguments of type 'struct' in MATLAB R2023a
"After upgrading from Version 2022b to 2023a today morning, it gives me an error in the exact same code which was running perfec...

5 days ago | 0

| accepted

Answered
Extracting datetime and adding reference time
fnm = 'GPS_P01.txt'; txt = fileread(fnm); one = regexp(txt,'(?<=REFERENCE\s*TIME\s*:\s*)[^\n]+','ignorecase','match','once'); ...

6 days ago | 0

Answered
finding a numeric pattern in an array
V = [11,5,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,11,2,31,5,1,2,11,2,31,5,1,2,11,2,31,5,1,2,11,2,31,5,1,2,11...

6 days ago | 0

| accepted

Answered
COMBINE MULTIPLE ASCII FILE WITH SIMILAR COLUMN FORMAT OF (X,Y,Z) INTO SINGLE SINGLE FILE OF SAME COLUMN (X,Y,Z)
[F,P] = uigetfile('*.asc','Select the asc-files', 'MultiSelect','on'); F = cellstr(F); C = cell(size(F)); for k = 1:numel(F) ...

6 days ago | 0

| accepted

Answered
Select values of a matrix given a matrix of indices?
"is there any fast way to do this?" Use SUB2IND: A = rand(10,10) x = [2,3;5,7]; y = [4,6;1,2]; idx = sub2ind(size(A),x,y); ...

7 days ago | 1

| accepted

Answered
How to combine two tables using sorted common variable?
You could use OUTERJOIN: https://www.mathworks.com/help/matlab/ref/table.outerjoin.html a = load('data_A.mat'); a = a.data_A ...

8 days ago | 1

| accepted

Answered
Matlab column extraction sematics
" Is there some guide to datatypes and operations on them in Matlab that would cover this?" Of course: https://www.mathworks.co...

8 days ago | 0

| accepted

Answered
how to transform a table with column names into an double array without column names
"But using 'table2arrray' directly, entries of 'X' are all transformed into '0'." I doubt that. What is much more likely is tha...

8 days ago | 0

Answered
Reading a single numerical value from regexp return
Get rid of the loop and process the entire file at once. Line-by-line just makes it more complex. You can get rid of one layer ...

8 days ago | 1

| accepted

Answered
Finding the indexes of multiple substrings within a larger string.
idx = regexp(c,'\d\d') % no overlaps idx = regexp(c,'\d(?=\d)') % with overlaps

8 days ago | 0

| accepted

Answered
I don't understand what this function is doing 'Invoke'
"but what these 0, 0, 0, 0, 1, 1, 0 is doing? also that 2 at the end?" Those are inputs to some COM object's method. The method...

9 days ago | 0

Answered
Why can't the index variable of a for loop be stored in a structure or other array?
"More broadly, is there some way to store index variables together?" status.loop1 = 1:10; for k = status.loop1 %do someth...

10 days ago | 1

Answered
Choosing specific column within cells
Why not just use the same loop? There does not seem to be any point in using a second loop. for k = 1:numel(C) F = fullfil...

10 days ago | 0

| accepted

Answered
Creating new matrices with input depending on csv filename
See: https://www.mathworks.com/help/matlab/ref/fullfile.html https://www.mathworks.com/help/matlab/import_export/process-a-sequ...

11 days ago | 0

| accepted

Answered
How to select specific rows of data from .mat file containing multiple column vectors
F = 'name of your mat file'; S = load(F); D = structfun(@(v)v(100:499),S, 'uni',0)

11 days ago | 0

Answered
count nan of different rows
S = load('TG_sshobscorr.mat'); D = S.sshobscorr; Try either of these: N = sum(~isnan(D),2) N = sum(isfinite(D),2)

11 days ago | 0

Answered
How to fix error with while loop?
"I keep getting the error shown below. How can I fix this? " By doing exactly what the error message tells you: move the script...

11 days ago | 0

Answered
when I using readtable to read .csv file all variable data get mixed, what are the reason for this and provide proper solution for this
There is no need to change the file format when you can simply specify the delimiter when importing: T = readtable('daily_cloud...

12 days ago | 0

| accepted

Answered
Adding Matrices into main diagonal of Matrix
"As we can see, matrix is not a 10x10 matrix with the main diagonal filled with the intended values above." After calling BLKDI...

12 days ago | 0

| accepted

Answered
How do I add to a structure in a for loop?
Rather than creating another variable, simply store the imported data in the same structure that you are already using. I also i...

12 days ago | 0

| accepted

Answered
Preallocating and filling long array with shorter arrays
The simple apparoach is to use a matrix or array, for example: N = 10; M = nan(5,N); for k = 1:N M(:,k) = rand(5,1); en...

13 days ago | 0

| accepted

Answered
posix/unix time to datetime
Unix time is actually defined as the number of seconds since the epoch. The times you show are the milliseconds since the epoch....

13 days ago | 1

| accepted

Answered
don't know how to write my for loop
The loop might be clearer iterating from 2, for example: N = 121; % total number of vectors A = rand(21,21); M = nan(21,N); ...

13 days ago | 0

Answered
I'd like to skip the file that's not there and bring it up!
A simple alternative approach is to use DIR: S = dir('01__input/NO_*.mat');: for k = 1:numel(S) F = fullfile(S(k).folder...

13 days ago | 0

Stephen23

Statistics

MATLAB Answers

MATLAB Answers

File Exchange

File Exchange

MATLAB Answers

File Exchange

File Exchange

File Exchange

File Exchange

MATLAB Answers

MATLAB Answers

MATLAB Answers

Content Feed