Community Profile

photo

BobH


Last seen: 11 months ago Active since 2020

Statistics

  • 3 Month Streak
  • Knowledgeable Level 2
  • First Answer

View badges

Content Feed

View by

Answered
getting the information from the figure
For recent versions of MATLAB (R2019a and after), the help on writematrix has useful examples that I think apply to your questio...

1 year ago | 0

Answered
I am trying to put zero on top of each generated column.
Your first reshape is the right approach, to arrange the values into a matrix with the right number of columns ws = 6; ...

1 year ago | 0

| accepted

Answered
Validating each value using a while loop
I think your while loop needs to have the input() within it While the user hasn't given a valid number Ask for a number ...

1 year ago | 0

Answered
How can I get my minimum spanning tree to select only one edge?
If this calculation is a smaller part of a larger problem like determining the shortest path between a pair of distant nodes, th...

1 year ago | 0

Answered
getting the information from the figure
This older question/answer suggests adding the 'Tag' property to the plot. https://www.mathworks.com/matlabcentral/answers/1166...

1 year ago | 0

| accepted

Answered
How to match two arrays in Matlab
Is this what you are trying to get? Second column of B based on C matching A A = 1:10; B = [21 22;10 11;23 25;33 30;32 35;21 ...

1 year ago | 0

Answered
How to quickly find the column index of the last non-zero element in all rows in a sparse matrix?
reorderRow = arrayfun(@(X) find(A(X,:),1,'last'), 1:size(A,1)) reorderRow = 1 2 3 2 3

1 year ago | 0

| accepted

Answered
Help with extracting info from a listbox in a specific way
You can build a cell array using the row as the index, and each element of the cell array can be a numeric array of the column(s...

1 year ago | 0

| accepted

Answered
Replace string and then place it again
This is intentionally backwards from what you asked; adjusting it to start with all '#' is for you helpful: https://www.mathwor...

1 year ago | 1

| accepted

Answered
Reordering string arrays if string is >9
sort_nat is powerful, and has helped me several times. An alternative for simple number/not-number values is straightforward f...

1 year ago | 0

| accepted

Answered
How to sum matrix of different size on Simulink? (R2019a)
The dimensions must agree, in MATLAB. Z = zeros(400,32); O = ones(1,32); Z+O; Error using + Matrix dimensions must agree....

1 year ago | 0

Answered
Using 'for loop' on a function call
If you want to iterate along x_min and x_max, you can use a single counter in your for loop for i = 1 : length(x_min) % both v...

1 year ago | 0

| accepted

Answered
Concatenating vectors based on list of variable names
c = cellfun(@eval, order, 'un', 0); r = vertcat( c{:} ); % horzcat if that's what you wanted, and all variables in order are...

1 year ago | 0

| accepted

Answered
How do I delete cell elements from a cell array?
function kmvsolve hw_i = {'K',5,2; 50,4,'v'; 70,'m',9 }; hw_o = physicsHW( hw_i ) end function out = physi...

1 year ago | 0

Answered
Why is my code messing up on this specific test case?
function out = lostAtSeaCucumber( vec, srch ) collected = ''; % temporary storage for names visited = zeros(size(ve...

1 year ago | 0

| accepted

Answered
How can I index a vector based on the vector's values?
V = [2 5 4 1 3]; R(1) = V(1); for i = 2:length(V) R(end+1) = V( R(i-1) ); end R % new vector R = 2 5 3 ...

1 year ago | 0

| accepted

Answered
Change Julian date read in from excel to a MM-dd-yyyy form and plotting
see https://www.mathworks.com/help/exlink/convert-dates-between-microsoft-excel-and-matlab.html and perhaps this old question w...

1 year ago | 0

| accepted

Answered
Importing txt files and using loops
Similar to Mario Malic but using regular expressions R = []; % init to empty fid = fopen('J94.txt','r'); t = fge...

1 year ago | 0

Answered
Shifting of 3D curve
You seem to be dividing the axis scale by 5. The same steps also apply to 'XTickLabel' ylabel = get(gca, 'YTickLabel') % ret...

1 year ago | 0

| accepted

Answered
Reduce MATLAB method startup time
I couldn't find a way to avoid the delay, but I use this to give the user a reason for the delay. It uses my specific situatio...

1 year ago | 0

Answered
for loop for switch case
would arrayfun work for your code? It would handle both x as a single number and x as a vector, setting 'a' to a single number ...

1 year ago | 0

| accepted

Answered
Updating a zeroized matrix with provided row vectors
Force(Nodal_Loads(:,1),:) = Nodal_Loads(:,2:4)

1 year ago | 0

| accepted

Answered
how can i deal with .mat file in Matlab?
See load It will add variables from the mat file to your workspace.

1 year ago | 0

Answered
Find and replace in a character array
See regexprep and remember that to get a single-quote it must be doubled up in the replacement string F='(B~C) + (~AB)'; rege...

1 year ago | 0

Answered
Storing the output of a program in a matrix
Do you mean like this? progA = @() 42; % return 42 for each invocation y = progA() y = 42 z = arrayfun(@(X) progA(),...

1 year ago | 0

Answered
Coordinates of a 3 by 3 by 3 array
yy=zeros(3,3,3); yy(1,2,3) = 1 yy(:,:,1) = 0 0 0 0 0 0 0 0 0 yy(:,:,2) = 0 ...

1 year ago | 0

Answered
How to shuffle matrix entries using MATLAB?
perhaps a modification based on the sample code showing use of perms?

1 year ago | 0

| accepted

Answered
Extract lines of a three dimensional matrix using an array of indices and NO for-loop
Use column 1 of m to select rows of r in the first >> r( m(:,1), :,1) ans = 1 0 2 1 1 Use column 2 of m...

1 year ago | 0

| accepted

Answered
How do I create a matrix from a file from reading the first row and then use that first number to control a "for" loop to build
MOHD AQUIB is on the right track, reading one data point first before the loop, but left out the part within the loop that conti...

1 year ago | 0

Answered
How can turn two indexing vectors into a corresponding matrix that counts how many locations that point has been hit?
The diagonal of a matrix is those elements whose subscripts are (1,1), (2,2), etc s = sparse(x, y, 1) s = (1,1) 2 ...

1 year ago | 0

| accepted

Load more