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Feeds
How to set a tolerance?
The first rule of debugging: look at the data! data_1 = readmatrix('DataSet2_Test.txt') % much better than LOAD %Characterize ...
8 days ago | 0
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Unexpected size change when assigning a scalar to a 0x0 matrix using (:, :) indexing
As far as I can tell this behavior is not explicitly documented. The rule seem to be something like this: if and only if all non...
9 days ago | 1
Introduction to Matrix inversion and finite element analysis. Is this code right?
Yes, the code looks correct. Here is a quick sanity-check of each key piece: DOF numbering is consistent throughout: node i own...
23 days ago | 1
persistent variable from previous run is not deleted during a new run of my .m file
MATLAB is not C. The tidiest way to avoid that ugliness is to use nested functions: https://www.mathworks.com/help/matlab/matla...
1 month ago | 2
How to find a rotation vector for use in rotate, if the rotation matrix is rank deficient?
You have two separate problems happening: Wrong solver for homogeneous systems: linsolve and lsqminnorm are for Ax=b with b~=0....
1 month ago | 0
| accepted
problem with patch fill color
After x_outer ends at r_max·cos(el_min), your lower_line_x starts at x_inner(1) = r_min·cos(el_min), creating an implicit jump a...
1 month ago | 1
How to print a line of text with multiple variables
%Initial Uncalibrated Meas. p_analog_uncal = [20,40,60,80,100,120]; dV_avg_uncal = [1.246378,1.500449,1.763329,2.015415,2.29...
1 month ago | 0
Using timeit() in the debugger causes function speedup until edits are made
This behaviour is almost certainly due to MATLAB's JIT (Just-In-Time) engine: https://blogs.mathworks.com/loren/2016/02/12/run-...
2 months ago | 1
Want to know the output format of audioread of .wav file captured by hydrophone
Short Answer: the default mode is normalized (dimensionless), NOT Volts or Pascals. MATLAB's audioread in default mode reads th...
2 months ago | 1
| accepted
How to correct the grouping variables in splitapply ?
The error is coming from this line: weightpercentages = [app.Callingapp.Osmotisk_data.Weight_percent_best_salt_1 app.Callingapp...
2 months ago | 0
| accepted
plsrectify the error in my code
The error occurs because READTABLE returns a table object, and you cannot extract the content from a table using parentheses lik...
2 months ago | 1
| accepted
Restarting background data acquisition when going back - multiple mlapp files
dpb has the right idea. Using an explicit polling loop (while/pause) to watch for the closure of the child screen adds unnecessa...
2 months ago | 1
| accepted
write different data types to excel sheet
"It appears to be stored as cell data" It is clearly stored as a string array: S = load('Variable.mat') S.line0 T = array2ta...
2 months ago | 1
Matrix 10x10 with same number in each row by column.
Method 1: REPMAT: M = repmat(1:10,10,1) Method 2: MTIMES: M = ones(10,1)*(1:10) Method 3: MAX M = max(zeros(10),1:10) Meth...
2 months ago | 2
| accepted
Trying to solve for a number of variables in a matrix. Getting a structfun error.
You have 9 equations but only 8 unknowns (u2–u9). Since u1=0 is already substituted in, MATLAB's solve sees an overconstrained s...
2 months ago | 0
Efficient overlapping block processing with nested sub blocks (similar to im2col with stride)
Your reshape/permute chain is working backwards: you're extracting in the "wrong" order and then correcting it. The cleaner appr...
2 months ago | 2
| accepted
Nested tiledlayout: can parent tiles have different widths depending on number of child tiles?
I don't think there is an automatic way to do this, but you could specify the TileSpan to achieve (approximately) equal sizes. ...
2 months ago | 0
Reading a string & sorting it into usable variables
Create demo file: writelines({'Layup: [45/-45/0/90/90/0/-45/45]','Ply thickness: [0.18/0.18/0.18/0.18/0.18/0.18/0.18/0.18]','El...
2 months ago | 0
How do I insert the comma marker for thousands into large numbers while printing to file or Command Line in MATLAB 7.7 (R2008b)?
Assuming that you have already converted to text: A = '1200387'; F = @(t) regexprep(t,'(?<!(\.|[eE][-+]?)\d*)\d{1,3}(?=(\d{3})...
2 months ago | 0
Inserting a 1000 separator
Assuming that you have already converted to text: A = '11201453.21'; F = @(t) regexprep(t,'(?<!(\.|[eE][-+]?)\d*)\d{1,3}(?=(\d...
2 months ago | 0
how to set 1000 separator for large numbers in GUI MATLAB
No FLIPLR required: F = @(t) regexprep(t,'(?<!(\.|[eE][-+]?)\d*)\d{1,3}(?=(\d{3})+(e|E|\.|\>))', '$&,'); And tested: F('1 1...
2 months ago | 1
Method lookup in multiple inheritance
f(d) class(d) Compare: classdef d < a % what you wrote in your question. classdef d < b & c % what the file actually con...
2 months ago | 0
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Weird Behaviour of Parallel Processing when Using BlockProc
I doubt that your example is good use of the parallel toolbox. Parallel code can be slower than serial code due to high communic...
2 months ago | 0
| accepted
problem exporting figure to a single channel
plot(rand(7,3)) F = getframe(figure(1)); I = im2gray(F.cdata); imwrite(I,'test.png') size(I) clearvars J = imread('t...
3 months ago | 0
How to find and utilize a "built-in method % static method or namespace function"
Yes, your interpretation is correct. The output: tifflib is a built-in method % static method or namespace function means tha...
3 months ago | 0
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Error Saving Fig with complicated filename
"is there a reason why a matlab figure won't save when the filepath is like this" Yes, because colons are not valid in MS Windo...
3 months ago | 1
| accepted
Extracting from cell arrays using a nested loop
The issue is that subData{c} is being overwritten on each iteration of k, whereas you need to index into both dimensions (c and ...
3 months ago | 0
| accepted
Question about loading multiple files
"What am I missing?" You are missing the fact that this line FILES= DIR_STR.name defines a comma-separated list: https://ww...
3 months ago | 3
| accepted
fit function - Incorrect number or types of inputs or outputs for function fit.
@Kevin: you do not have FIT from the Curve Fitting Toolbox listed. Check your licenses online: https://www.mathworks.com/help/m...
3 months ago | 0
| accepted
I need my code to work/dont know what is going wrong.
Explanation There are a few clear bugs causing your problems. Let me walk through each one. Bug 1: The function is called twic...
3 months ago | 1
| accepted
