Cris LaPierre

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MathWorks

903 total contributions since 2018

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Answered
How to pass variable from .m file to appdesigner?
I would suggest turning your m-file into a function that returns data as a function output. Then you can call your function from...

alrededor de 4 horas ago | 0

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how to count data frequency by year and month?
Easier to help if you share your data. Convert your station name and station code to categoricals. Convert your time to datetim...

alrededor de 4 horas ago | 1

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How to make an histogram for month with datetime series, the data is windvelocity for a 1 year?
I don't think you want to do histograms. Try a boxplot instead. Boxplots convey information about the spread of the data, but in...

alrededor de 4 horas ago | 0

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importdata cuts my files in half!
When I open the file you have attached (outside MATLAB), it only contains 2500 rows. Perhaps you meant to attach a different fil...

alrededor de 5 horas ago | 0

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Find all integer values contained within an irregular volume
I wonder if the functions inpolygon and inpolyhedron might be helpful here. See this post about finding the points inside a 3D v...

alrededor de 18 horas ago | 0

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Bin edges of discretize function excluding some bins
mtransf(102,:) = discretize(mtransf(101,:),binEgdes,"Categorical",catnames); mtransf(102,mtransf(102,:)==4)=NaN;

alrededor de 19 horas ago | 0

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Find/return value from each row in a big matrix that corresponds with a condition/value
Is the order of the resulting vector important? You can just do a normal equality comparison, then use any to create a logical ...

alrededor de 20 horas ago | 0

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How to make a new matrix out of the combination of 12 matrix
use indexing. A = zeros(401,101); B = ones(401,101); C = [A(:,[1 3 5]), B(:,[10 20 20])];

alrededor de 20 horas ago | 0

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Exporting matrix as .txt file
The best approach would be to define a variable for each format specified in your fprintf statement. Without it, MATLAB, which i...

1 día ago | 0

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How to reorganize the data in table?
Use groupsummary. Group the data first by E then by M. Groupsummary will tell you the count of each group. Here's an example usi...

1 día ago | 1

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AppDesigner GUI Inexplicably Moving Components
I was able to open and close your app several times without seeing the issue you are describing. If you are still seeing it, I s...

2 días ago | 0

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Read data from editing text in GUI
Keep in mind variable scope for functions. Look at the inputs to your function rhs function dxdt=rhs(t,x) The handles structur...

2 días ago | 0

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undefined variable even with equal sign, tried to see if it was the () but no luck
EVS is only defined in the case where n>=3 (btw, you don't need the parentheses around n and 3). What is your value of n? If it'...

2 días ago | 0

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Plotting graph with excel file
We'll have to make some assumptions, since we don't have all the details. I'm going to assume your data is in a table with 3 va...

5 días ago | 0

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Scaling of one axis only in 2D plot
Set the position property. See this post.

5 días ago | 0

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I need an established reference on optimizing Matlab code.
Not sure if this is what you are looking for, but here are some resources I'm aware of: MATLAB Performance Optimization Perfor...

5 días ago | 0

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Add text to column numbers in variables editor
I'm fairly certain only tables can have named columns. A similar post can be seen here.

6 días ago | 0

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How to prepare imagedatastore for Image to single value regression
Let's fix the error first. What is Y_train? Converting it to categorical is simple enough. Y_train = categorical(Y_train); Wit...

6 días ago | 0

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detecting and removing eye blinks from 4-channel EEG signal
We don't have nearly enough information to help you. However, you might try using the Find Local Maxima and Minima task in the l...

6 días ago | 0

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Z must be a matrix, not scalar or vector
z needs to be the same size as X and Y. Perhaps you mean to do something like this? t=linspace(0, 2*pi); T = meshgrid(t); x=2...

7 días ago | 1

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Answered
How to remove first 19 rows from a multidimensional cell array
Use a cellfun. % Setup A(1)={rand(100,10)}; A(2)={rand(100,11)}; A(3)={rand(100,10)}; A(4)={rand(100,15)}; % Remove firs...

7 días ago | 0

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Answered
RE-use helper function on multiple GUI components
Since the app structure is a structure, you can dynamically set the field names. There are a couple ways you could do it. Here's...

7 días ago | 1

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How to make a zoom in y map in MATLAB Visualizations Custom
Can you add this to your code? geolimits([-12.210 -11.923],[-77.306 -76.936])

7 días ago | 0

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Offline execution of a program in MATLAB online
You need to maintain an active connection or your session will time out. See Hisham's reply here.

7 días ago | 0

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For loop is not working
A loop runs the same code over and over. That means you overwrite your variables each time. As you've written it, the result wil...

7 días ago | 0

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overlaying 3 contourf plots into 1 figure.
All 3 contourf plots are there. You can verify this with the plot browser. You do only see the one that was plotted last. The le...

7 días ago | 0

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Put data into bins with pre-specified intervals
Use histcounts and specify the bin edges using the syntax [N,edges] = histcounts(X,edges)

7 días ago | 0

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Answered
Turning triangulation data into 3D spatial matrix
I would see if the inpolygon function can be used here. It works for 2D data, but with some creativity, you may be able to get i...

7 días ago | 1

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Answered
Plotting a single fit for multiple years by averaging the fit co-efficients of individual years.
How is your data organized? I would probably get the day-of-year for all dates, plot the data against that, and then fit a curve...

7 días ago | 0

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How we can segment the time series signal in Matlab?
You can accomplish this with the retime function. You first need to convert your data to a timetable. Then call retime using the...

7 días ago | 0