dpb

Last seen: Today | Active since 2012

Statistics

All

Content Feed

Answered
I have a problem regarding an Index because it exceeds array bounds.
It would appear that the X array is 37xN instead of Nx37... BTW, you don't need a loop to compute the difference; diff() is vec...

11 hours ago | 0

Answered
How do I group data into different groups based on values of 2 columns for analysis?
fn='https://www.mathworks.com/matlabcentral/answers/uploaded_files/1361218/position_velocity%20data.xlsx'; tLC=readtable(fn); ...

11 hours ago | 0

| accepted

Answered
Why are my line plots are coming out improperly?
Well, there's no "problem" with the nested loop other than apparently it isn't what you intended... :) It iterates through each...

1 day ago | 0

Answered
How can I properly extract individual filenames, with often times similar naming?
Putting meta-data into the file names is a large part of the issue; but if the files are something other than data files that ar...

1 day ago | 1

| accepted

Answered
Matching two array elements by rounding up and down
fn='https://www.mathworks.com/matlabcentral/answers/uploaded_files/1359918/data_list.txt'; tT=readtable(fn); ix=isfinite(tT.B)...

1 day ago | 2

| accepted

Answered
Can I remove the date from big data set text file?
Not easily, no you can't ignore the date because the file is tab delimited and the date/time is a single string. To ignore it a...

3 days ago | 0

| accepted

Answered
Fastest way to search files by pattern name
As far as the original Q?, it's owing to how the underlying OS processes the dir command -- when you ask for a directory listing...

3 days ago | 0

| accepted

Answered
How to identify text files with zero value
"...is any way to extract the text files[?]" What do you mean by "extract", precisely? What is the end result you're after; to...

3 days ago | 0

| accepted

Answered
Writing txt files accurately with a restriction on the number of columns.
Still with same idea but a little cleaner implementation... %a=randi(200,[1,25]); %fmt=['%d' repmat(',%d',1,numel(a)-1)]; %s=...

3 days ago | 0

Answered
Writing txt files accurately with a restriction on the number of columns.
a=randi(200,[1,25]); fmt=['%d' repmat(',%d',1,numel(a)-1)]; s=sprintf(fmt,a) LL=25; L=strlength(s) O=[]; while L>0 I=st...

4 days ago | 2

| accepted

Answered
I have 400 columns of matrix, I want to calculate FWHM. I'm trying find codes related to find peaks, but nothing works. I cannot see the FWHM as 400 different columns.
fn='https://www.mathworks.com/matlabcentral/answers/uploaded_files/1356933/ace%20re.xlsx'; data=readmatrix(fn); whos data plo...

5 days ago | 1

| accepted

Answered
Extract numbers from matrix based on logical array
x =[ 0.5853 0.2551 0.8909 0.2238 0.5060 0.9593 0.7513 0.6991 0.5472].'; y =logical([ 0 1 1 1 ...

6 days ago | 1

Answered
How to know the range automatically identified by readtable when importing an Excel file?
It will be only as good as the ability of the detectImportOptions bot's ability to recognize the start of the data, but opt=det...

6 days ago | 0

| accepted

Answered
I am using writetable for exporting the workspace variables into excel sheet
Read the rest of the doc, specifically the <named parameters for spreadsheets only> section, you'll be particularly interested i...

7 days ago | 0

Answered
How do I create a For loop from a string array that will fill and load h5 files?
I didn't see @Stephen23 had already addressed the main iissue, but had already started, so... d=dir('*Walk.h5'); for i = 1:num...

7 days ago | 0

| accepted

Answered
Converting table data to datetime
tbldata=readtable('pipe2_st.csv'); tbldataarray=table2cell(tbldata); Don't convert the table to a cell array, use the table yo...

8 days ago | 0

Answered
Changing step tolerance for lsqcurvefit
opt=optimoptions('lsqcurvefit'); opt.StepTolerance=1E-8 in your code above ... Dab = lsqcurvefit(@f, x0, t, c) % fitting Dab...

8 days ago | 0

| accepted

Answered
Why is FFT result divided by NFFT instead of the root of NFFT?
Well, let's try it and see... Fs = 1000; % Sampling frequency T = 1/Fs; % Sampling period L = 1500; ...

8 days ago | 1

Answered
Find the average between each pair of points in a matrix
I'd do it as z=randi([-5 5],8) za=filter2(ones(2)/4,z) % averaging 2D filter with same size as input (zero padded) zv...

8 days ago | 1

Answered
Array rows differences and array filling in a loop
The cell array @Jon shows is simpler to code and what first strikes, but the answer to the Q? as you posed it to store into the ...

8 days ago | 1

Answered
How do I edit this bar graph so that the weights appear equally distanced on the x-axis with 4 bars for each weight, all of different colour.
The weights vector is 'x' There are examples of grouped bar plots at the doc page...sorry, I said 'stacked' before; that's what...

10 days ago | 0

Answered
Fit a equation to a scatter plot in log log scale with the given parameters
fn='https://www.mathworks.com/matlabcentral/answers/uploaded_files/1350879/Data_1.xlsx'; A=readmatrix(fn); x=A(:,1); y=A(:,2)...

10 days ago | 0

Answered
How do I edit this bar graph so that the weights appear equally distanced on the x-axis with 4 bars for each weight, all of different colour.
Use X as a vector as categorical (or if numeric, use 1:N and then write the x tick labels with the desired values for display), ...

10 days ago | 0

Answered
How can I pass a large function into ODE45?
Write your function as an m file and pass a handle to it; don't try to do stuff in scripts or complicated stuff as anonymous fun...

10 days ago | 1

Answered
Extract matching row from another cell array
Air code; the load operation didn't work online... >> load all_files >> pieces=split(extractBefore(all_files,'.'),'_'); Error...

11 days ago | 0

Answered
how to find the location of a specific element in a matrix or in a excel file
What do you mean "to find the location of each element"? You mean just read the file, don't you; the location is really of very...

11 days ago | 0

| accepted

Answered
How I can find a specific word in a notepad text?
"i want to find the word " lege" in the document and then to count how mnay times apear this specific word" txt=readlines('your...

13 days ago | 2

| accepted

Answered
Matlab App Designer - Output to TextArea Error - 'Value' must be a character vector, or a 1-D array of the following type: cell array of character vectors, string, or categori
app.ClassificationTextArea.Value{i+1} = classification; tries to address the .Value property as a cell array which it doesn't s...

14 days ago | 0

Answered
Editor Text Is Too Small
The Editor Font selection is buried under the "Fonts -- Custom" menu in the Preferences. Why it's not associated with the Edito...

14 days ago | 0

| accepted

Answered
Formatting read data from text files
txt=readlines('YourInputFile.txt'); % read text file as string array fprintf('%s\n',txt) % dumpt to com...

15 days ago | 1

dpb

Statistics

MATLAB Answers

File Exchange

MATLAB Answers

MATLAB Answers

MATLAB Answers

MATLAB Answers

MATLAB Answers

Cody

Content Feed