Community Profile

photo

Stephen Cobeldick


5.682 total contributions since 2014

Suspensa Vix Via Fit

Stephen Cobeldick's Badges

  • Master
  • 36 Month Streak
  • Thankful Level 4
  • Revival Level 2
  • Knowledgeable Level 4
  • First Answer

View details...

Contributions in
View by

Answered
could anyone help me to solve the issue with respect to the code
"What i actually need is idx should be different for each run" The easiest way is to define them before the loop, e.g.: A = 1:...

ongeveer 3 uur ago | 0

Answered
Extracting specific rows from multiple data files to store as variables
"....and store in such a way that allows me to keep track of which stems from which file." That is easy using the structure ret...

ongeveer 16 uur ago | 1

| accepted

Answered
Unable to perform assignment because dot indexing is not supported for variables of this type.
You re-defined the variable name for the loop iterator variable: dots.nDots = 100; %^^^ variable name. for dots = 1:dots.nDot...

ongeveer 17 uur ago | 0

| accepted

Answered
how do you get the max y value in an fplot?
If you actually want to find the numerical solution (and not just whatever fplot happens to have calculated) then you can trivia...

ongeveer 18 uur ago | 0

Answered
how to extract data from the fixed-width-field format using fscanf or textscan
A simple solution based on regeprep and sscanf. Before the file-reading loop: vec = [8,16,16,16,8,8]; rgx = sprintf('(.{%d})',...

ongeveer 23 uur ago | 0

Answered
Generating vectors of length N with only -1s and 1s.
>> M = 5; >> N = 19; >> randi(0:1,M,N)*2-1 ans = -1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 1 ...

1 dag ago | 0

| accepted

Answered
Given a matrix A, create the matrix B whose elements are the neighbor sumr for A
Much simpler to just use conv2: >> A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16] A = 1 2 3 4 5 6 7 ...

1 dag ago | 1

Answered
finding number sequences in a vector and set them to the adjacent values
>> V = [ 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0] V = 0 0 0 0 0 0 0 0...

1 dag ago | 1

Answered
getting Complex double in matlab while excel solves it
(1-exp(-(WL-0.26053)./0.15994)).^2.28411 % % ^^^^ ^ positive values (around 5) %^^^ ...

3 dagen ago | 0

| accepted

Answered
1) I need a code to determine the intersection points, I have tried '==' is not working, also I would like to know if it is possible to make the grid line look like a graph sheet i.e using Xtick and Ytick
Use fzero to find the intersection of two functions. Method one: functions >> F1 = @(x)1.5*x-1; >> F2 = @(x)0.3*x; >> X = 0:...

3 dagen ago | 3

Answered
How to access induvidual elements in a string
The simplest and most efficient solution is to use sscanf: >> S = '23hrs 45min'; >> V = sscanf(S,'%fhrs%fmin') V = 23 ...

3 dagen ago | 0

Answered
Using a binary matrix as an index to select values from another matrix
>> X = [1,0;3.5,1;0,6]; >> p = [13,12;11,19;22,23]; >> p.*(X==1) ans = 13 0 0 19 0 0

4 dagen ago | 0

Answered
Executing .m files function in R2015b is not working properly
Ugh, invalid filenames and anti-pattern dynamic variable names... it seems that your task was explicitly designed to torture int...

4 dagen ago | 0

| accepted

Answered
Check if any elements of cell array are equal ?
Matching: >> a{1}=[1,1,0]; >> a{2}=[9,9,9,9]; >> a{3}=[1,1,0]; >> a{4}=[]; >> N = numel(a); >> [X,Y] = ndgrid(1:N); >> Z ...

4 dagen ago | 2

| accepted

Answered
Code for Multiple Matrix Multiplication
>> T=randi(9,4,4,3); % fake data >> T(:,:,1)*T(:,:,2)*T(:,:,3) % your approach ans = 2359 1398 2072 2154 1788 ...

4 dagen ago | 0

| accepted

Answered
how xor is used between two no.? or which command ?
I suspect that you actually want to be using bitxor (and possibly also specify the classes): >> bitxor(mod(176+233,256),142) a...

4 dagen ago | 1

| accepted

Answered
How to create legend from cell array?
Simply using one cell array: legend(itm{2}(1:4)) or using your approach of separate input arguments (character vectors): lege...

4 dagen ago | 1

| accepted

Answered
Extracting data from multiple structures in a .mat file
Do NOT load directly in the workspace. If you do that, then you will force yourself into writing slow, complex, buggy code by t...

5 dagen ago | 1

| accepted

Answered
Create structure path from string and cell array
I already answered this in your last question: https://www.mathworks.com/matlabcentral/answers/466887-extracting-data-from-mult...

5 dagen ago | 0

Answered
how can I generate random decimal numbers in a specific decimal range?
v = [-2.96706,2.96706]; v(1)+diff(v)*rand(1,6)

5 dagen ago | 0

| accepted

Answered
How to delete numbers from cell?
Simpler with regexprep: >> D = regexprep(C,'^\S+\s*','') D = 'SPEED MEASURED 1 [rpm]' 'MOTOR SPEED [rpm]' 'MOTO...

5 dagen ago | 2

| accepted

Answered
To assign to or create a variable in a table, the number of rows must match the height of the table
You wrote a literal string instead of concatenating the variable data onto the end of the character vector. fullfile('C:\Users\...

5 dagen ago | 0

| accepted

Answered
Matlab is giving conflicting results, please help.
"...but Matlab still says they aren't equal?" Because they aren't equal. This is very easy to check (you already used one meth...

5 dagen ago | 0

| accepted

Answered
How to read specific lines from a text file and store them in a matrix?
This code should work regardless of the number of rows or columns: opt = {'Headerlines',3, 'CollectOutput',true}; fid = fopen(...

6 dagen ago | 1

| accepted

Answered
How do I add an additional column to a cell array based on existing values in another column?
>> x = {'x1',1';'x2',2;'x3',1} x = 'x1' [1] 'x2' [2] 'x3' [1] >> x(:,3) = {0}; >> x([x{:,2}]==1,3) =...

6 dagen ago | 0

Answered
Why doesn't legend distinguish colors?
The problem occurs on this line: plot(t,ca,'r') Because t is a vector (with 501 elements) and ca is a scalar, then you are tel...

6 dagen ago | 0

| accepted

Answered
Building the Fibonacci using recursive
I doubt that a recursive function is a very efficient approach for this task, but here is one anyway: function v = myfib(n,v) ...

6 dagen ago | 0

Answered
How do I multiply an integer with a single value from the matrix?
You need to convert the character vector (contained in the output) into numeric, e.g.: C = inputdlg(...); % C is a cell array o...

7 dagen ago | 0

| accepted

Answered
When using the eval function, MATLAB doesn't recognize " , " as an ASCII character, rendering it useless
Evil eval strikes again! This is a very good example of how using eval results in slow, complex code that is buggy and hard to ...

7 dagen ago | 2

Load more