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Ollie A


Last seen: 2 years ago |  Active since 2018

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Analysing Equation in matlab
Be careful when multiplying and dividing arrays; you will need to use the dot notation. You remembered it for d = payload .* ...

4 years ago | 1

Question


PDE toolbox coefficients in functional form
I am using PDE toolbox to simulate current flow through a 2D conductive medium. I want to use my results from this model as a f...

4 years ago | 0 answers | 0

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Aligning a stack of images
I have 40 images in a stack that make up a video. I need the images to be (near) perfectly aligned. At the moment there are ver...

5 years ago | 1 answer | 0

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Answered
Fibonacci serie, can not calculate with big number
If you're trying to calculate numbers in the Fibonacci series, there is a MATLAB function for it: Fibonacci If this doesn't he...

6 years ago | 0

Answered
Save images every certain period
for imagenumber = 1:1000 if mod(imagenumber,10)==0 % Modulo filename = sprintf('Image%d.png',imagenumber); ...

6 years ago | 1

Answered
how can i solve such two problems in single script file and run them?
There are two ways you could construct your function, as a symbolic function using syms, or as an expression that operates on a ...

6 years ago | 0

Answered
Import time and date text file
You could try using: fid = fopen('filename.txt'); string = textscan(fid,'%s','delimiter','\n'); % Read in lines of string to v...

6 years ago | 0

Answered
How to generate random points
R = randi([0 1], 1000); imshow(R); Is this what you're looking for?

6 years ago | 0

Answered
using meshgrid to create a mesh
I don't think you have to meshgrid(Z), instead your 12x12 Z matrix represents the height of the mesh plot at coordinates specifi...

6 years ago | 0

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Losing precision when writing to Excel using xlswrite
It could be to do with the format of the excel cells. In excel you can increase the number of decimal places displayed. Otherwi...

6 years ago | 0

Answered
Cell array to matix
You could try using: M = {}; % Your cell N = cat(3,M{:}); % Concatenate matrices along 3rd dimension This will give you a sin...

6 years ago | 0

Answered
Finding the set of unique values for another set of unique values
This should do the trick: M = [ 1,2;1,3;1,2;2,4;2,4;2,5]; % Your matrix u = unique(M(:,1)); for x = 1:length(u) N{x} = u...

6 years ago | 1

Answered
How can I change the spacing/number of ticks in a figure?
This link should help: yticks It says you can specify the ticks on the y-axis. In your case it would be done as follows: ytic...

6 years ago | 0

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Answered
What is the correct equation?
You have a variable t in your equation which is a vector. In order to multiply vectors in MATLAB you must use the syntax .*. In ...

6 years ago | 0

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Answered
Having trouble creating a table
Make sure the variables you create your table with are column vectors. In this case I suspect your vectors are row vectors. Jus...

6 years ago | 0

Answered
How I can i read all files in a folder
You can use sprintf(). for n = 1:20 filename = sprintf('speaker1_%03d.wav', n) end Then within the loop input filename into...

6 years ago | 0

Answered
How can I index the edges of a matrix
I have interpreted your question to mean that for both matrices, you want the set all of the matrix, except the edge, to zero an...

6 years ago | 1

Answered
transform duration into some visible in the table
Duration just refers to the format of the data stored in each cell array. You could convert your cell to a table, which might h...

6 years ago | 1

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Answered
XTick labels for bar plot of 2 data sets
You can modify the colour of individual bars in the bar chart using CData. This documentation explains it well: CData Here is...

6 years ago | 0

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How to implement this equation?
If is a tensor, you could represent it as a matrix. Then your code should look something like this: lamda = ones(1,n); b = s...

6 years ago | 0

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Answered
How to average 5 rows of a vector recursively?
V = 1:9445; % Your vector setsize = 5; for x = 1:length(V)/setsize Vnew(x) = mean(V((x-1)*setsize+1:x*setsize)) end I...

6 years ago | 0

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Answered
How do I plot the surface plot and surface plot based on the equation and conditions below?
a = 15; b = 7.5; k = 4*100/pi; % Define constants. X = linspace(-5,5,101); [x,y] = meshgrid(X,X); % x and y range. n = ...

6 years ago | 1

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Answered
Attempting to write my data into a single CSV file.
I would create a table, using the MATLAB function T = table(response, reaction_time); and then simply writing the table to a c...

6 years ago | 1

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Question


Solving PDEs: time dependent c coefficient
I am solving a PDE to simulate current flow through a conductive medium in 2D. My geometry is as follows: With Neumann bound...

6 years ago | 1 answer | 1

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Can I import a 2D binary image to use as a pde geometry?
I want to import a binary image (bmp, png, etc.) of a 2D shape to use as the geometry for my pde model. Is this possible?

6 years ago | 0 answers | 0

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