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jonas

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522 total contributions since 2018

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How to replace numbers in one vector according to two 'translation vectors'
D = interp1(B,C,A)

3 days ago | 0

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Extracting data from vector
sum(NUM(NUM>5))

3 days ago | 0

How do I calculate monthly mean of a 3-D matrix?
Using retime is one option, you would just have to shape your array into a timetable first, which is a bit of a hassle. I thin...

7 days ago | 0

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How to include more precise time intervals on my graph? (MATLAB R2020a)
Not so complicated, you just need to figure out the right properties to change. The function "datetick" is for datenum, which is...

21 days ago | 0

How do I stitch multiple images in a spiral order
I would just put each image in a cell array, A(1)... A(n) based on their original name. Then it's just a matter of indexing. He...

23 days ago | 0

creat a grid from xyz file
%make a 100x100 grid [XX,YY] = meshgrid(linspace(min(X),max(X),100),linspace(min(Y),max(Y),100)) %interpolate Z data to grid ...

23 days ago | 0

how to fix particular connected component in multiple frames
Here's something I stitched together that works OK for the images you provided. I had to start by cropping them to the right siz...

25 days ago | 0

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How to plot complete 3D RGB color space (gamut) in matlab?
Code adapted from this guide (link) vert = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1]; fac = [1 2 6 5;2 3 7 6;3 4 8 7;4...

28 days ago | 1

How can I set an axis outside the polar figure
I've modified your code. Not sure how robust this solution is, but you can try this: figure(2) set(gcf,'color','w'); ax = pol...

28 days ago | 0

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Find the 3-D grid coordinates points index that are interior of a 3D surface boundary
Seems your isosurface is not a convex hull, which is why you end up with some points on the outside. You can try a combination o...

29 days ago | 0

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How to binarize this image with removing some noises with smooth surface and getting red laser line in the binary image
I had some difficulty obtaining a solid black line by thresholding only. Since its a simple straight line, you could try somethi...

1 month ago | 0

converting string (python) datetime to matlab
fmt_dt='yyyy-MM-dd HH:mm:ss.SSSSSSZ'; ↑ Also, as noted in the comments, Format should be rep...

1 month ago | 0

distance measurement in image based on intensity difference
I would first binarize the image and then go columnwise to find the last white pixel. RGB = imread('B00001.jpg'); GRAY = rgb2g...

1 month ago | 0

Finding number of connected components of a single value of pixel
If you want to find the two black (false) components, then you need to pass the complement and use 4-connectivity (no diagonal c...

1 month ago | 0

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3D Temperature distribution plot
It is convenient to have the variable you want to plot as layers in your 3d data. In other words you want a XYZ matrix but you h...

1 month ago | 1

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90% Percentile of Matrix
There is probably a one-liner for this, but I guess you could use A = [0.289, 0.254, 0.287, 0.292, 0.289, 0.267, 0.289, 0.304, ...

1 month ago | 1

most efficient way of plotting surf/mesh from live data
It is correct that creating a new surface object every time is slowing you down. Updating the existing object is much faster. Co...

1 month ago | 1

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Cell arrays difference operation
First of all I would use cell2mat() to concatenate your cell array tempTOT_hot into a 261x285 array (double) Then everything is...

1 month ago | 0

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How could I plot geobubble and geoplot in the same figure?
This is not a very good solution, but its something. It seems you cannot use plotm() etc. from the mapping toolbox in the same a...

1 month ago | 1

How to enable the colorbar to only show the vertical scale with values ?
Not sure if this answers your question, but it's an alternative to using a colorbar for scale. Also did not use the "outside" ar...

1 month ago | 0

Is it possible to identify data in a for loop?
I would probably collect the data in the loop instead and then call plot outside of the loop. Could use something like this: d=...

2 months ago | 0

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Display data ONLY inside closed polygons
Super simple if you have X,Y,Z with Z being elevation as well as a closed polygon defined by xp and yp %some sample data [X,Y]...

2 months ago | 0

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Merge .txt files with specific suffix
Could do something like this if you have a small number of "groups". For a large number of groups, I would suggest just extracti...

2 months ago | 0

RGB Image re-interlacing missing output colors.
I'm guessing your input image is uint8 (0 = black, 255 = saturated) and that your output image is class double (0 = black, 1 = ...

2 months ago | 0

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How to check if my time series has a repeated hour in a matrix of 10200 rows?
Convert everything to datetime and then check the difference %some data, note that 2000-1-1 10:00:00 is repeated t = datetime(...

2 months ago | 0

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Saving gray scale image
Using a single color channel to convert your image to grayscale is not optimal. The gray tone is usually a combination of red, b...

2 months ago | 1

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How can I georeference this grid/matrix?
With the mapping toolbox you can just replace your plot functions with the corresponding map axes function. load coastlines a...

2 months ago | 0

how to load an ASCII file
Based on the sample given in the comments A = readmatrix('Trial 1.txt') or better yet, opts = detectImportOptions('Trial 1.tx...

2 months ago | 0

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