# Mike Croucher

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**Content Feed**

Efficient way of Vectorization

Switch the order of the loops around. It will be faster because you'll be operating on the matrix column-wise test function ...

10 days ago | 4

Macbook arm M1/M2 chip support

Yes. It is in development now. There was a beta released a few months ago that is no longer available Exploring the MATLAB beta...

1 month ago | 1

How can i plot this function? y=0.75/(log10(x)*2).^2

How about this? x = linspace(0.01,0.99,100); % Avoid tricky inputs like 1 y = 0.75./(log10(x)*2).^2; plot(x,y)

1 month ago | 0

Why aren't the first and last peaks detected using findpeaks()?

For vec1, the reason is that the peak is also the last data point and so is intentionally exlcuded. The findpeaks documentation...

1 month ago | 1

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sin(2*pi) vs sind(360)

If you ever need to compute sin(x*pi) or cos(x*pi), its better to do sinpi(x) or cospi(x). You never explicitly multily x by a ...

2 months ago | 1

Why in matlab sin(pi) is not zero but sin(pi/2) is 1?

If you ever need to compute sin(x*pi) or cos(x*pi), its better to do sinpi(x) or cospi(x). You never explicitly multily x by a ...

2 months ago | 2

Solved

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 ...

2 months ago

Is there any concept like dictionary or hash tables in matlab like in Python?

As of R2022b, MATLAB has a new dictionary datatype An introduction to dictionaries (associative arrays) in MATLAB » The MATLAB B...

3 months ago | 8

How to make dictionary in Matlab

In R2022b and later, you can use the new dictionary type for this. Faster than containers.map. A tutorial-like introduction at...

3 months ago | 0

| accepted

Dictionaries of Hashtables in MATLAB?

Reviving this thread in 2022 because R2022b contains a new dictionary data type. A tutorial-like introduction at An introductio...

3 months ago | 1

Faster alternative to containers.Map

MATLAB R2022b has a new dictionary datatype that's much faster than containers.map. A tutorial-like introduction at An introduc...

3 months ago | 0

how to remove/kill the figure produced with colormap

If the colormap is the most recent command you've executed, it will be the current figure. As such, you can use delete(gcf) W...

3 months ago | 0

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How do I know how large an array can fit on the GPU?

As you've seen, gpuDevice() gives you information about your GPU. This is what I get for mine >> gpuDevice() ans = CUDA...

4 months ago | 0

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process based parpool: keep the data in the workers

Parfor is great, it auto-parallelises for us and takes care of a lot of things like data transfer to/from workers and so on. At ...

5 months ago | 0

using matlab compiler to read a .mat file at run time

You can tell the compiler to exclude things using an Exclude pragma A demo: I created a .mat file as follows myvar = 1; save(...

7 months ago | 1

| accepted

Is MATLAB supported on Apple Silicon Macs?

Blog post on this topic at Exploring the MATLAB beta for Native Apple Silicon » The MATLAB Blog - MATLAB & Simulink (mathworks.c...

7 months ago | 1

Anderson Darling Goodness-of-the-fit test?

The statistics toolbox has an adtest function. It can test against a specific distribution with known parameters, or a more gene...

8 months ago | 1

| accepted

Using Parfor for solving ODE via numerical methods (Euler)

As others have said, you cannot parallelise this loop. However, what you can do is parallelise independent runs of this loop. ...

9 months ago | 1

OCR on a screenshot

Hi Paolo Just because I am MathWorks staff doesn't mean anything here because until right now I've never used MATLAB's ocr func...

10 months ago | 2

| accepted

i dont get why it says Unrecognized function or variable 'Nbin when i run it

It's because you have this line [count,center]=hist(x,Nbin); Nbin needs to be defined as the number of bins you want in the hi...

11 months ago | 0

I would like to plot two bar charts side by side using separate y-axis for each corresponding plot.

Try tilledlayout. Documented at Create tiled chart layout - MATLAB tiledlayout (mathworks.com) % I want one row of plots with...

11 months ago | 0

| accepted

Solved

Convert from Fahrenheit to Celsius

Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

11 months ago

Highlighted

Help us help you: Post your code

Every day, thousands of people ask questions on <https://mathworks.com/matlabcentral/answers/index MATLAB Answers> and many of t...

11 months ago | 23

arrayfun doesn't work with rmoutliers

arrayfun operates on every element of the array. So arrayfun(@rmoutliers,A,"UniformOutput",false) is like doing rmoutliers(0...

11 months ago | 0

variables cannot be saved in matlab

This looks like an operating system error. In particular, you are trying to write to a folder where you don't have write permis...

11 months ago | 0

| accepted

Values are getting updated every 15 seconds in thingspeak. How do I lower this time?

I guess you are using the free tier of thingspeak which is limited to one update every 15 seconds. For faster updates, you'll n...

1 year ago | 2

| accepted

Double Integration error using /

You need to vectorise your equation alpha = 1.0; inte = @(y,x) (cos(x).^2)./(1 + alpha./(cos(x).*sqrt(1 - 1./y.^2))).^2.*(1./...

1 year ago | 1

fsolve gives the same value for different parameters of the nonlinear equation

It seems that chaging the paramet C_TIC from 0 to 2.78 doesn't affect the outpur much. I changed your function slightly so that...

1 year ago | 0

Converting MATLAB code into python code

Hi Aakash To get this running on a HPC system, it would be beneficial to know the details of the HPC system. As I said in my co...

1 year ago | 10

| accepted

What is the difference between lu() and decomposition([],'lu')?

The two output form of lu() does use a different algorithm compared to the decomposition object. Also, it is not possible to sa...

1 year ago | 0

| accepted