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# Michael Croucher

Last seen: 6 months ago Active since 2020

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Is there any work around the error "Array concatenation is not supported"?
As Joss said, what you want to do is outside the scope of what arrayfun can do but all is not lost if what you want is speed-up ...

8 months ago | 0

How to format matrix to 4 decimal places in engineering notation:
There are only a limited number of supported formats that apply automatically to all output. The closest to what you want is sh...

8 months ago | 0

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Get the length of a given vector
Given a vector x, the output y should equal the length of x.

8 months ago

HPC with Matlab no performance improvement
This is a huge topic which has entire Master's level courses devoted to it but I'll try to give an oversimplifed view. TL;DR ...

8 months ago | 2

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Inner product of two vectors
Find the inner product of two vectors.

8 months ago

Solved

Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

8 months ago

For loop only running through the first file and not all files?
How about something like this? path = './'; %just the path to the directory finaldata = []; for year = 1979:2015 for ...

8 months ago | 0

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Question

Variable precision arithmetic in ode45 and others?
Is it possible to use vpa in ordinary differential equation solvers like ode45?

8 months ago | 3 answers | 0

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Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

8 months ago

Random numbers from CDF
You can pass your pd to the random function. Does this do what you want? To get a 100000 by 1 vector of random numbers from yo...

8 months ago | 0

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Given a and b, return the sum a+b in c.

8 months ago

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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

8 months ago

Can I schedule a job in Matlab online
One way of achieving your aim would be to use the public cloud. Compile your .m file using MATLAB Compiler, install it on a clo...

8 months ago | 0

stl export for geometry from pointcloud/array
I should start this answer with 'I have no idea what I'm doing here'. I found your question interesting and have had a go at it...

8 months ago | 0

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

9 months ago

How do I write a 3D matrix to a file, and then read it back in?
I haven't played with the matfile function in this way before so tried a little experiment that may also serve to help you use t...

9 months ago | 1

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

9 months ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

9 months ago

Compiling matlab code for the cluster
You need to compile on a Linux machine. You may find that you can compile on the cluster in question -- something to check with...

9 months ago | 0

Path between 2 nodes in a graph
One way to proceed would be to use concomp. Take this example graph s = [1 2 2 3 3 3 4 5 5 5 8 8]; t = [2 3 4 1 4 5 5 3 6 7 9...

9 months ago | 0

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No print contents in slurm.out files
I can't test this as I don't currently have access to a SLURM cluster with MATLAB on it. I guess you submit jobs using the sbat...

9 months ago | 0

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How to insert multiple spreadsheets to a workbook from Matlab
You can add the number of sheets as an extra argument. So, for 5 sheets: eNewSheet = Add(eSheets,[],eSheet1,5);

9 months ago | 0

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How to import symbolic expressions from Python to MATLAB?
Imagine your friend had a Python function that created that expression. Let's call it create_symbolic_expression() and put it i...

9 months ago | 2

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Import excel data from web doesn't work
The main issue is that MATLAB doesn't recognise what Sheet name within that spreadsheet that you want to import. This gets you ...

9 months ago | 0

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fmincon optimization in matlab using OutputFcn
Following the advice at https://uk.mathworks.com/help/matlab/math/output-functions.html, we can use the 'OutputFcn' option. By ...

9 months ago | 0

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fsolve options generate different results
We can learn a little more by asking for more output from fsolve [x,~,~,output_no_options] = fsolve(fun,x0); opts = optimopt...

9 months ago | 0

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How to get convergence in Gradient descent algorithm?
Here's my MATLAB port of that code data=dlmread('data.csv'); X = data(:,1); Y = data(:,2); %Building the model m = 0; c ...

9 months ago | 1

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Unary operator '-' is not supported for operand of type 'function_handle' in for loop function
You have defined D as a function but in line 36 you are not using it as a function. You have defined it as a function of a vari...

9 months ago | 1

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