Walter Roberson
I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location. I am currently caught up to T0099119; if you are waiting on a reply from me for an older issue, please send me a reminder.
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English
Statistics
RANK
1
of 288.456
REPUTATION
135.332
CONTRIBUTIONS
37 Questions
59.861 Answers
ANSWER ACCEPTANCE
48.65%
VOTES RECEIVED
18.195
RANK
of 19.481
REPUTATION
N/A
AVERAGE RATING
0.00
CONTRIBUTIONS
0 Files
DOWNLOADS
0
ALL TIME DOWNLOADS
0
CONTRIBUTIONS
0 Posts
CONTRIBUTIONS
0 Public Channels
AVERAGE RATING
CONTRIBUTIONS
0 Highlights
AVERAGE NO. OF LIKES
Content Feed
Does the Data Acquisition Toolbox, introduced in 2020A, have a similar fuction to "release(session)"?
No, just delete the daq object.
ongeveer 8 uur ago | 0
Error (Unable to perform assignment because value of type 'sym' is not convertible to 'double'.)
PcT = zeros(length(thresh)); PcT is assigned as numeric zeros. F1 = int( PL(w)*f(w) * (1/(1+ U(T) * PA * B(i) * w^(-...
ongeveer 16 uur ago | 0
Convert series of analytical solutions to matrix vector format
syms x I E0 B l C3 C4 C5 F kt V1 = int(1/2 * I * E0 * (1 + (B-1) * x/l) * (2*C3 + 6*C4*x + 12*C5*x^2)^2, x, 0, l); V2 = int(...
ongeveer 16 uur ago | 0
| accepted
Error using symengine Unable to convert expression containing symbolic variables into double array. Apply 'subs' function first to substitute values for
axes clear clc close all format short g ndofn = 3; % number of degrees of freedom per node % each number corresponds to a ...
ongeveer 16 uur ago | 1
| accepted
Error using Fseek. Invalid filer identifier, use fopen to generate a valid file identifier.
You attempt to open 45C.fid/fid but 45C.fid does not exist as a folder -- existing folder is 45temps.fid and 45meas.fid You sho...
1 dag ago | 0
| accepted
How can I process all the possible pairs of arrays without using 2 nested for loops?
if all(triu(FirstMatrix) == triu(SecondMatrix), 'all')
1 dag ago | 0
what is wrong on my codes ? I can not get my result any one help?
You need A = eye(6); However, A*x <= b with A = eye(6) is equivalent to x <= b which is the same thing expressed by UB, so the...
2 dagen ago | 0
Error using plot Vectors must be the same length.
fs=500; t=(0:(6*fs-1))/fs; sygnal2a=sin(t(1:500)*1*2*pi); sygnal2b=sin(t(1:500)*1*2*pi+2*pi); sygnal2b is the same as sygn...
2 dagen ago | 0
| accepted
MATLAB freeze after closing figures
This is a known problem with R2023b and Apple Silicon https://www.mathworks.com/matlabcentral/answers/710913-matlab-r2020b-free...
2 dagen ago | 0
How to optimise an objective function with a summation of integrals
x = lsqnonlin(@(x)(S(P,T,N,Limites_Sectores_T,x)), x0, lb, ub,[],[],Aeq, beq, options); There are a few different valid calling...
3 dagen ago | 0
Matrixwise subtraction yields vector - how to reshape to original logical matrix?
One way: result = arrayfun(@(IDX) mean(A(cmpMatrix(:,IDX),IDX)-B(cmpMatrix(:,IDX),IDX)), 1:size(A,2)) Chances are that this wi...
4 dagen ago | 1
How to import text data with different column lengths without having NaN
There is no option for producing column vectors of different lengths. After you readtable, you can newTable = varfunc(@(DATA...
4 dagen ago | 0
Wrong print negative number with fprintf in hex
rng(73); N = 20; r = (randn(N, 1) + 1j.*randn(N, 1)) * 10000; for i = 1:N fprintf('Real[%d] = %04X; ', i, typecast(int16...
4 dagen ago | 2
Solving large number of equations
syms X1 X2 X3 X4 X5 X6 X7 X8 p_11 = 1; p_12 = 2; p_13 = 3; p_14 = 4; p_15 = 5; p_16 = 6; p_17 = 7; p_21 = 8; p_22 = 9; p_23 ...
4 dagen ago | 0
| accepted
How to Rewrite This Section of Code as a For Loop
termAsum = 0; for term = termA(:).' termAsum = termAsum + term; end
4 dagen ago | 0
Running code for different variable values.
theta = 0:2:12; num_theta = length(theta); alpha = zeros(num_theta, 147); for i = 1 : num_theta this_theta = theta(i); ...
4 dagen ago | 0
imread file does not exist - Unable to read file with multiple images
% Specify the filename containing images foldername = 'D:\BMPtoPNG'; % Read all images from the file dinfo = dir(foldername...
5 dagen ago | 0
Operands to the logical AND (&&) and OR (||) operators must be convertible to logical scalar values. Use the ANY or ALL functions to reduce operands to logical scalar values.
You would get this error if the grading system is expecting n to be a scalar but n is a 2D array instead.
5 dagen ago | 0
| accepted
Variable q4 has an incorrect value.
syms x y g(x,y) = x*y/(x^2+y^2) dyxx = diff(diff(diff(g(x,y),y),x),x) q4 = subs(dyxx,{x,y},{1.2,3.8})
5 dagen ago | 0
| accepted
How do I complete my matlab code for a given formula.?
The first thing you have to do is figure out which of the two clusters corresponds to which condition. kmeans() clustering with...
5 dagen ago | 0
| accepted
Variable q5 must be of size [1 2]. It is currently of size [1 1]. Check where the variable is assigned a value.
syms x y f(x,y)=x-x*y^2+sqrt(y); u = sym([2,9]); part1 = u/norm(u) part2 = jacobian(f(x,y),[x,y]) q5 = dot(part1, part2) Y...
5 dagen ago | 0
im constantly getting this error in my matlab code can someone expalin what i should do or how it should be
q4 = subs(fyxx(x, y), [x,y], point);
5 dagen ago | 0
MATLAB does not run on new iMAC
You need to deactivate on your old Mac and reactivate on your new Mac.
5 dagen ago | 0
I did make an code of fast fourier transform. But there's an error on the code when I run it. There's anyone who more about and can assist or guide me to make the code running
You define a variable Window_Nhr but then you try to repmat Window_Nh
5 dagen ago | 0
| accepted
Which function used to use in M-Script to remove the variables
It is not possible to create a variable with a name similar to 1Tn007 What can happen is that if you load() a .mat that was ge...
5 dagen ago | 0
Need Help Simplifying code
Replace pick=find(max(playerInfo(2,:))==playerInfo(2,:)); pick=pick(1); with [~, pick] =...
5 dagen ago | 0
| accepted
Legend according to colours of the bars
questionnaire = {'A', 'B', 'C', 'D', 'E', 'F'}; for i = 1:numel(arrays) subplot(4, 1, i); values = arrays{i}(:, 2);...
5 dagen ago | 0
why i got this error when i want to use GPU to accelerate the simulation?
In MATLAB R2021b, only the following are supported for GPU Coder work: Microsoft Visual C++ 2019 product family Microsoft Vis...
6 dagen ago | 0
| accepted
Can I create a stand-alone Windows application from my Mac that permits parallel processing?
There is no support for building for a Windows target on a Mac or Linux. ... You could potentially use Parallels.
6 dagen ago | 0
| accepted
Will Quality of Documentation be better in 2024 Products?
No, it will not improve in R2024a.
6 dagen ago | 2