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How can I polar plot in decibels?
If you have a recent version of Matlab (R2016a or later), you can use polaraxes/polarplot to get much more flexibility in settin...

6 years ago | 1

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How to get the order indices in a character array?
c = {... 'x_air' 'v_air' 'p_headspace' 'p_environment' ...

6 years ago | 4

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What is this stack trace and what can I do to avoid it?
This isn't really an answer to the why of the question, but I can agree that this is a common problem (in my experience, at leas...

6 years ago | 0

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How to plot temporal changes in batches of data?
Assuming your file is read into a table array, I think the quickest way to do this is to unstack the SSID data and then plot: ...

6 years ago | 1

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Is the upper limit of a color bar the true maximum value of the data in the color map, or is it larger ?
The color limits are usually set to match the plotted data for most standard functions (pcolor, surf, imagesc, etc), although th...

6 years ago | 0

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Is there a function to identify whether polylines are located inside a polygonal region?
You can try out my <https://github.com/kakearney/lineinpolygon-pkg lineinpolygon.m> function. (Sorry, the GitHub repo doesn't h...

6 years ago | 1

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seimlogx not working in an iteration
The |hold on| command is the culprit... you're issuing it before you plot, so the linear axis is being held throughout. If you ...

6 years ago | 1

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How to avoid white patch in contourf ?
Matlab's |contourf| function doesn't actually plot contour faces for lower-than-lowest-clevel regions when are unenclosed. (And...

6 years ago | 2

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How can I quickly find the intersections between many individual line segments and a polygon?
Is your polygon always convex? If so, you can do the ray extension from each polygon vertex in all directions at once, and assu...

6 years ago | 1

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Insert specific number of rows of zeroes(5) after every 56 rows in my n*m matrix. I am able to create matrices but can I do the insertion without loop given I know the size of matrix? Thanks for help
Another approach, which works even if your data doesn't divide evenly: x = rand(21,6); nrow = 5; % number of ro...

6 years ago | 0

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Answered
gscatter: connecting groups by lines through this function
The |gscatter| function already plots the data as line objects... you just need to add a visible line style: h = gscatter(....

6 years ago | 3

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Legend not showing markers
I've found that legends can sometimes benefit from taking a deep breath. Not sure exactly why, but it seems that since the intr...

6 years ago | 7

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Why is an empty string not empty? isempty('') returns true, but isempty("") returns false
I think string arrays function more like cell arrays in this context... the first element of the string itself isn't empty, but ...

6 years ago | 4

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Given the location (coordinates) of a point in a gridmesh, how can I extract the number of the grid that the point is located in?
You can use the |discretize| function to bin points: nx = 2; ny = 2; xedge = linspace(0,1,nx+1); yedge = lin...

6 years ago | 4

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Stretch parts of axis (non uniform axis)
You could scale the data appropriately and then overwrite the tick labels, but assuming you only have a few scaling blocks, I of...

6 years ago | 2

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How to index a matrix using the ITERATION values of a valArray with non-consecutive numbers?
There are two ways you could do this. One is to use an index value corresponding to the length of your |s| values: s = [12...

6 years ago | 0

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Finding corresponding x value for second graph
Best guess, seeing that I can't see what your myode45function returns... It looks like your |y| matrix has at least 2 columns. ...

6 years ago | 0

6 years ago | 1

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I'm trying to sort one vector based on another vector of seemingly the same size, but i keep getting the index exceeds matrix dimensions error. What's the issue?
I'm pretty sure there a couple things in here that aren't working like you'd like them to. First, in you capital function, t...

6 years ago | 0

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Lines of longitude. How to merge points?
Assuming this is a first step in mapping something a bit more complicated, I'd suggest using an existing mapping toolbox rather ...

6 years ago | 1

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search through an array for patterns and put into cell arrays.
This sort of problem can usually be solved by using a various combinations of |diff|: A = [ 1 2 3 78 28 92 1 76 89 90 23 87...

6 years ago | 1

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Using Worldmap function to develop maps
When you say "shape of the map", do you mean you want higher resolution coastlines? If so, there are many places to download hi...

6 years ago | 1

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Kriging codes in matlab
Walter's answer links to the best toolbox that I know of for kriging in Matlab. However, if you really want to use the gstat me...

6 years ago | 2

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How to create array of linearly spaced values from starting and ending points
This method is faster than looping over linspace: x = linspace(0,1,nPoints); A2 = go + x.*(st - go); Here's a timing ...

7 years ago | 7

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How to make pcolor plot from three vector
You can calculate the bin averages pretty quickly using |discretize| and |accumarray|: Some sample data: npt = 10000; ...

7 years ago | 1

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How to take an average over one month during different years ?
A bit hard to tell from your screenshot whether your time array is an array of datetimes or an array of date strings. Assuming ...

7 years ago | 0

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Function to read a 16bit color composite image to matlab
Many years ago, I had to work with some 16-bit color avi files. Those files stored the RGB color data using 16 bits per pixel: 5...

7 years ago | 0

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Plotting vectors with different lengths due to missing values
Can you give a small sample of your data? Is it manually entered in a script, or are you reading it in from a file? In gener...

7 years ago | 1

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For loop: max iterations exceeded
That message typically comes from optimization routines, and it indicates that it wasn't able to meet the optimization criteria ...

7 years ago | 1

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Why my code doesn't work?
I haven't given any thought to the algorithm you show, though a quick test does seem to indicate it converges to cosh for small ...

7 years ago | 1