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# Cris LaPierre

### MathWorks

Last seen: Today Con actividad desde 2018

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Respondida
How to obtain a MATLAB licence number from the instructors in a MATLAB essentials coursework (free audit track)
You should be able to just drag and drop a file into your current folder browser in MATLAB Online.

1 día hace | 0

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Unrecognized function or variable 'X0'.
There are actually a lot of errors with your code. It might be worth taking a step back and thinking through your approach. Fir...

1 día hace | 0

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Issue using lsqcurvefit function - App Designer
Since you didn't share your code, I created a simple example in app designer using this example from the lsqcurvefit documentati...

1 día hace | 0

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my plot is blank?
There are 3 things to check right away that your variable velocitiesB1 and velocitiesB2 are not empty that those variables hav...

1 día hace | 1

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How to plot a figure from a data where a parameter is within a range (not with the full range of data)
Logical indexing load('H_LC(22).mat') idx = x(324,:)>0.4 & x(324,:)<0.9; plot(x(324,idx),x(323,idx),'k', 'LineWidth',1) x...

2 días hace | 0

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How to restore App designer's default layout
I would try the dropdown menu in the top right of your window. Select Restore

2 días hace | 1

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Error using reshape Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that dimension.
The issue appears to be that you do not have the number of elements in your array as you think you do. Your code was written e...

4 días hace | 0

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plot in matlab app design siteviewer
In App Designer, you need to designate the target axes. I think the equivalent code should look something like this (untested). ...

4 días hace | 1

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i need MATLAB code to I have yield data of 38 days , i want to expand the no of data to 151 keeping the sum same
You haven't provided any requirements, so the easiest way to do this is to just pad your vector with zeros. old = [3.46, 3.53, ...

4 días hace | 0

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Sort Matlab table, monthly and seasonally. plot mean and trend seasonal map
Use sortrows to sort your table. Create a column of month names using month. Convert them to categorical values and use mergeca...

4 días hace | 0

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Matlab 2021b is working very well when dealing with DRL . However, Matlab versions 2022a,2022b, and 2023a are always crashed. How to solve this problem?

4 días hace | 0

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read csv data with numbers, characters and text
Have you tried readtable? What didn't work about it? I get the results I would expect. It even successfully ignored the delimite...

4 días hace | 0

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calculating the average of a column of a csv file with specified steps and saving it in a new csv file
Here's a simple way to do this in MATLAB opts = detectImportOptions('Data_1min.csv','VariableNamingRule','preserve'); opts = s...

5 días hace | 0

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Locking sections of a Live Script
The best place to submit suggestions to the MathWorks is here under 'Create a Service Request': https://www.mathworks.com/suppo...

5 días hace | 0

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Invalid expression error even though the code seems to be correct
It appears you may not understand how to use the code you have shared. Your classdef code needs to go in it's own m-file (lines...

5 días hace | 0

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3D plotting with three input an one output.
If I understand isosurface correctly, you are showing a surface that represents where ed=1 in your volumetric data. For this sur...

5 días hace | 0

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insert box flag in table in the app designer

7 días hace | 1

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Hello, I want to make function Runge-Kutta orde 4 with equation depend on time, but in MATLAB i get some error
You have not defined j, so in MATLAB, by default that letter is used to create complex numbers. As the error message states, you...

8 días hace | 2

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Hi, I try to run the code, when it runs the workspace is empty, even if i try to global, cant seem to show, even if i search for k, it cant detect the variable.iable.
You are running a function, which has its own workspace. You can read more about that here: https://www.mathworks.com/help/matla...

8 días hace | 0

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Can I use roipoly on one image and get it to apply to multiple?
Yes. The output of roiploy is a binary mask. You can do whatever you'd like with that mask, including applying it to other image...

9 días hace | 1

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Problem with 2 plots, one in not showing and second one is showing up empty.
You need to include a markerstyle in your plot commands since you are plotting your data one point at a time. When you plot a si...

9 días hace | 0

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How to remove the background from the attached image
You would probably benefit by going through the Image Processing Onramp. If you want a broader introduction, consider the Image...

9 días hace | 0

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Index in position 1 is invalid. Array indices must be positive integers or logical values. Error in indexing (line 936)
Note how the example on the File Exchange page enters the function: Enter the function f(x,y): inline('x^2+y')

10 días hace | 1

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How do I use the fillmissing function in a table containing char elements? I am trying to use the 'previous' method.
Your syntax is fine. You might need to standardize your missing values first. For char arrays, missing is ' '. dblVar = [NaN;3;...

10 días hace | 0

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for loop value array must be a row vector(?)
I didn't realize that either. It does appear to be documented. valArray — Create a column vector, index, from subsequent colum...

10 días hace | 0

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Smoothening of a curve
You can use the Smooth Data task in a live script to interactively adjust your smoothing settings to arrive at an acceptable res...

10 días hace | 0

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what should i do for this error ?
Your second input to addRule does not appear to use the syntax expected by Numeric Rule descriptions in the addRule function in ...

11 días hace | 0

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How plot line in geographic map with initial coordinates and azimuth?
I think geoplot is the correct function. You just need to calculate the end coordinates. If you have the initial location, arcle...

11 días hace | 0

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I don't understand this command : F=find(B>4)
That looks correct. What is it you are expecting? Since the output is returning a single index for each value found, it is usln...

11 días hace | 3

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How to read the variable named sigma0 from multiple datas by using a loop ,where the datas are in h5 format?
MATLAB is case sensitive. Allfiles and allfiles are not the same thing. Also, the first input to h5read must be a single file n...

11 días hace | 0