millercommamatt

North Carolina State University

Active since 2013

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Atmospheric Research Scientist

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Color that shows by the imshow, doesn't match to the color that I expect.
This displays as expected for me. imshow(uint8(cat(3,... [0 128 0;0 255 255;255 255 255;0 0 0],... [0 0 0;255 255 128...

1 year ago | 1

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ERROR // Array indices must be positive integers or local values
It's because you can round to zero which is invalid as an index. Use ceil instead.

1 year ago | 0

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Display Volume in App Designer
The parent for volshow has to be a Viewer3D object. The parent of a Viewer3D object can be a Figure object (default) | Panel obj...

1 year ago | 0

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I want to open a tab-delimited XY text file in matlab, use the numerical values of the XY columns to create a matrix and plot the signal.
fid = fopen("AxographSampleData\220812_WT_MO_H134R_EA_1391 015.txt","r"); C = textscan(fid,'%f %f',"Delimiter",'\t','HeaderLine...

1 year ago | 1

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How to remove/add elements to an array?
% B = diff(A) = [768 12 757 767 12 756 ...1524.....768 13 754 271] % note that B will be one less in length than A % if B(n...

1 year ago | 0

Answered
How to annotate borders with different colors?
This example from the Documentation includes a way to do this. https://www.mathworks.com/help/images/correcting-nonuniform-illu...

1 year ago | 0

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Different Size of array after each loop interation
If you want the data from each file to be on their own row, you'll need to use something like a cell array or a structure since ...

1 year ago | 0

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Map Axes and Colorbars - Colorbar Overlapping Labels
When creating a colorbar to go with a map axes based plot, the colorbar overlaps the labels. What's the optimal solution for p...

1 year ago | 1 answer | 1

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Counting number of white > 5 Pixel objects in BW image
You should be able to to something like this. I'm waiting on a slow scatter interpolation on my client to finish so I haven't te...

1 year ago | 0

Answered
Colorbar with histogram next to it
You can do this in Matlab. However, there's nothing like this built in, so you're going to have the handle all the placements of...

1 year ago | 0

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Timestamp - x axis
It's because you're turned your datetime type variable into a datenum and plotted that. Datenums are the number of days since Ja...

1 year ago | 0

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Why does my .csv file create spaces between each of my data points? It makes it to where I cannot graph precipitation against the date.
You're defining the columns as strings so the output is going to include whitespace. You want something like: ... data = ...

1 year ago | 0

Answered
Plotting surface returns error
Your first two inputs need to be reversed. That is, the order in which they are provided to the function need to be switched.

1 year ago | 0

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Date/Time Processing and Formatting Issues
dt = datetime(x,'InputFormat', 'yyyy:DDD:HH:MM:ss.SSSSSSSSS');

1 year ago | 0

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My code is only returning the last output
vec = mat(i,end); In this line you're always using the last column by specifying end. I think you want: vec = mat(i,:); If I'...

1 year ago | 0

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Mask image in Matlab
I think imclose will do what you want. https://www.mathworks.com/help/images/ref/imclose.html

1 year ago | 0

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file parsing identifier need to choose the correct identifier
st = '04_T_A_tx01_3009.txt'; id_cell = regexp(st,'tx\d+','match'); id_char = id_cell{1};

1 year ago | 0

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Create triangulated beam with meshgrid
https://www.mathworks.com/help/matlab/delaunay-triangulation.html

1 year ago | 0

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How to utilize an existing API to download weather data and use it for calculations in a MATLAB script?
Build a string that is structured like this and use it as the input to webread: https://developer.nrel.gov/api/solar/data_query...

1 year ago | 0

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I am trying to replicate the “Planning Radar Network Coverage over Terrain” example in MATLAB and want to know how can I change the region of this example?
You need the correct SRTM elevation file for the area you're interested in. These DTED files are only 1x1 degree. You're specify...

1 year ago | 1

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Average data from multiple csv files
Here's an example of how to approach this. You'll have to make this work with your specific data and functions. You can do this ...

1 year ago | 0

Answered
How to share variables between button functions in App Designer?
You want to store these variable as a Property. https://www.mathworks.com/help/matlab/creating_guis/share-data-across-callbacks...

1 year ago | 0

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How can I overlay a shapefile onto a geoscatter plot?
Plotting shapefiles on a geographic axis isn't always the best experience. You'll note that geoshow is intended for use with a s...

2 years ago | 0

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Download MATLAB2020b for linux
On the download page you can select your release on the left hand side, and then you can selection your OS via the main download...

2 years ago | 0

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Help plotting satellite data?
geoshow(lat(:), lon(:), long(:),'DisplayType','ImageMap');

2 years ago | 0

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Answered
Basic question about loops
You could make use of genvarname, but this would work too. for i = 2:5 eval(['Idx' num2str(i) ' = Idx(:,' num2str(i) ');']...

2 years ago | 0

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Convert nifti file containing a brain region of interest to a logical vector (number of seeds (in this case 1) x number of voxels?
Start here: https://www.mathworks.com/matlabcentral/fileexchange?q=NIfTI

2 years ago | 0

Answered
Load .slk file format (excel can open it, but can't import it to matlab)
data = readtable('your_spreadsheet.slk','FileType','spreadsheet');

2 years ago | 0

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How to Convert .nii file to png/jpg
https://www.mathworks.com/matlabcentral/fileexchange?q=NIfTI

2 years ago | 0

Answered
Why MATLAB cannot render $\Beta$ (LaTeX string) in xlabel, ylabel?
For an upper case beta, just use B and not \Beta. Here's the characters you can use: https://www.mathworks.com/help/matlab/crea...

2 years ago | 1

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millercommamatt

North Carolina State University

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