# LeChat

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Researcher in Physics and Mechanics Professional Interests: image processing, physics of soft condensed matter, mechanics, granular media, emulsions, acoustics...

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Question

Pass a plot handle into a function argument

Hi, I would like to write a function to easily remove the plot I just created from the figure legend. Say I call the plot plt s...

5 months ago | 3 answers | 0

### 3

answersQuestion

reading serial COM port on the fly (weighting scale -> WinPC)

Hi, I am trying to read on the fly output data from a serial COM port on a weighting scale (mine is a Sartorius Entris), on my ...

1 year ago | 1 answer | 0

### 1

answerQuestion

Superclass contains a parse error

Hi, For one month now, I have been having the following error when launching a code (any code containing "readtable" command) r...

1 year ago | 1 answer | 0

### 1

answerWhere to store my pathdef.m

You need to name the file along with the path your are giving. So go to the menu Home>Set Path, then set up your path and save....

2 years ago | 0

Question

setup of Matlab R2021a on Linux Mint with GPU acceleration

Hi, I just installed Linux Mint 20.1 on my computer (ThinkPad P51 with Nvidia Quadro 2200m). I have issues regarding Matlab an...

3 years ago | 0 answers | 1

### 0

answersQuestion

Parameter fitting using Machine Learning techniques on time series

Hi, I have a time variying quantity X(t) that can behave according to two different behaviors, let's call them A and B. Behavi...

3 years ago | 1 answer | 0

### 1

answerQuestion

Is there a built-in function for errorbarxy?

Hi, Like many other I need to plot errorbar plot on both the x and y dimensions. I found the errorbarxy as well as the ploterr...

3 years ago | 1 answer | 0

### 1

answerCheck if any field in a given structure is empty

It might be a bit dirty because I use a loop but it works: ind=[]; for ii=1:numel(MyStruct) if isempty(MyStruct(ii).Field...

3 years ago | 0

Question

How can I optimize this recursive for loop?

Hi, I have this recursive fo loop and I would like to know if there is some way in Matlab by which I could optimize the computa...

4 years ago | 1 answer | 0

### 1

answerQuestion

Error in Java path specification

Hi, I just got a Windows computer (Win10) and just installed Matlab 2019b. When I launch Matlab, I keep having this error messa...

4 years ago | 0 answers | 0

### 0

answersHow to install Matlab Jupyter engine on macOS

Try this short tutorial that I posted a couple years ago: https://blog.espci.fr/notesdegeeks/2017/12/29/matlab-notebooks-in-jup...

4 years ago | 0

find barycenter of several objects on an image

I just tried the following, I think I am getting close but I am quite there: % take the upper part of the matrix (above the dia...

4 years ago | 0

| accepted

Question

find barycenter of several objects on an image

Hi, I have a logical symmetric matrix in matlab: crossing_table, see attached file as well as the plot of this matrix. I would...

4 years ago | 2 answers | 0

### 2

answersGtk-Message: 10:32:31.466: Failed to load module "canberra-gtk-module"

It had the same message and then I followed @Scott Minkin recommandation and I still have a message, but a different one: me@my...

4 years ago | 0

Write line by line a separated .csv file with a string \t an integer \t [a n*2 matrix written in line with commas and semicolon]

Ok, thanks to Walter Roberson advice to use mat2str Matlab function, I manage to obtain what I was looking for. One of the firs...

4 years ago | 0

| accepted

Question

Write line by line a separated .csv file with a string \t an integer \t [a n*2 matrix written in line with commas and semicolon]

Hi, because of previous functions I wrote and that I do not want to modify, I need to write line by line a separated .csv file ...

4 years ago | 2 answers | 0

### 2

answerswhy the Matlab editor is so slow to respond to keyboard and editing

You want to upgrade you kernel (in Linux, version > 5.1) and then update Matlab to its last version (R2019a update >2). See her...

4 years ago | 0

Typing in the live editor is slow on Linux

I found a work around for Mac a couple years ago (here), by installing Matlab kernel into Jupyther. Check references therein for...

4 years ago | 0

Question

Detect inter-particle contact

Hi, I have a picture of emulsion droplets. I want to detect the inter-droplet contacts and for each of these patches, plot the i...

5 years ago | 0 answers | 0

### 0

answersQuestion

LaTeX interpreter but sans-serif font on figures

Hi, On LaTeX I often use the \usepackage{cmbright} font when I want to have a clean, sans-serif font both in the text and in...

5 years ago | 1 answer | 3

### 1

answerQuestion

How to fix remote Matlab display resolution when using ssh -X?

I have a Desktop computer (Ubuntu 18.10) which I use for my heavy computations. When not at the office, I use my Macbook (Late 2...

5 years ago | 1 answer | 0

### 1

answerhow to install a downloaded toolbox?

I think you can find the answer here: <https://www.mathworks.com/help/matlab/ref/matlab.addons.toolbox.installtoolbox.html>

5 years ago | 3

| accepted

Why does MATLAB crash when plotting in Linux with Nvidia drivers?

As previously said, this crash is caused by the Linux Nvidia driver. As a general rule, update the driver of your Nvidia GPU to ...

6 years ago | 2

Question

What is the difference between mean(A,'omitnan') and nanmean(A) ?

Hi, I have a vector A (or could be a matrix) which contains finite values as well as NaNs. I want to compute the mean value of...

6 years ago | 2 answers | 0

### 2

answersHow to adjust the zcolor scale in a scatter plot?

Ok, found it thanks to il_raffa on Stack Overflow ;) I use the clim option: set(gca,'clim',[lb ub]) lb and ub being the...

7 years ago | 1

| accepted

Question

How to adjust the zcolor scale in a scatter plot?

Hi, I have a data set, contained in three vectors say xx, yy and zz. I want to plot yy vs xx with the marker color face accordi...

7 years ago | 1 answer | 0

### 1

answerQuestion

How to install, load CUDA driver and set Matlab to do GPU processing on my Apple Macbook Pro Retina running OS X 10.10 Yosemite ?

Hello, I would like to use some parallel computing function using the GPU. I tried to use gpuarray function but I have got th...

9 years ago | 0 answers | 0