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Better “centerpoint” than centroid of a concave polygon
I just ran into this problem when trying to place a text label in the middle of a crescent-shaped ice shelf. The centroid or the...

4 years ago | 1

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Stereographic plot of Sea Surface Temperature Data around Antarctica.
Hi Ravi, There are a couple of ways to do this. Here's one way: Turn your vectors of latitude,longitude coordinates into 2D ...

4 years ago | 0

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plot using latitude and longitude
That looks like you have scattered data. If you have an array of latitudes, an array of longitudes, and a corresponding array of...

4 years ago | 0

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polybuffer distance in meters?
I think you've got it right, Alex, but this calls for an explanation of the phrase numeric scalar. The word numeric just means a...

4 years ago | 1

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ploting 2d graph of a vector
You've pretty much got it, but you'll need to define a range of t values, and a value for the constants A, and B. You also need ...

4 years ago | 0

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Specific color corresponding to specific data using contourf colormap
Perhaps @Kelly Kearney's contourfcmap is what you need?

4 years ago | 0

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Make a vector plot of the velocity field in polar coordinates
Can you use cart2pol to convert the coordinates and vector components to polar coordinates?

4 years ago | 0

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Why ?? Undefined function 'crosscorr' for input arguments of type 'double'.
crosscorr is part of the econ toolbox. If you don't have that toolbox, you can probably rewrite your code to use xcorr instead. ...

4 years ago | 0

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Fit data recorded with different internal clocks
This is an interesting problem. If you can identify a few peaks that occur throughout the 600 s measurement, and those peaks are...

4 years ago | 0

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How to create map with [x;y] coordinates? Mapping toolbox
No guaratees on the accuracy of the attached functions, but you may be able to convert between lat,lon and x,y using the attache...

4 years ago | 0

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Answered
How can i solve for this issue with the logical flow
I think the error is here: term3=q(i-1)*((r(i)-dr)/r(i)*dr); The first time through the loop, i=1, meaning i-1=0. There is no...

4 years ago | 0

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Adding line change the size of the image
Can you get the axis limits before plotting the lines, and then set the axis back to those limits afterwards? Something like thi...

4 years ago | 0

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Color along line in polaraxes
What if you interpolate along a dense line and plot with polarscatter? I'm thinking something like this: theta = linspace(0,...

4 years ago | 0

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Answered
How to make a surface plot of imported data of a numerical function z=f(x,y)
Just to be clear, you already have the data, and it takes this form M = [x y z]; where x, y, and z are columns? My next qu...

4 years ago | 0

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time position in graphic
This question is pretty vague, but here's pi displayed at the bottom right corner of a plot: txt = text(1,0,num2str(pi,'%4i'),...

4 years ago | 1

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I have a climatic dataset of a region where I am calculating time series (for drought index). The dimension of the dataset is 164*153*1416 (1416 months in the dataset and the others are the location). How I can average this over space and time?
To get a map of average SPEI, SPEI_mean = mean(SPEI,3,'omitnan'); and that calculates the mean along the third dimension (ti...

4 years ago | 0

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Antarctic Mapping Tool: how can I evaluate the distance of a point from the coastline?
The easiest solution is the dist2mask function in the Antarctic boundaries add-on for AMT. Syntax is d = dist2mask('openocean'...

4 years ago | 0

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How to mask a 3-D raster using a multiple feature attribute shapefile?
Try this: mask = inpolygon(X,Y,[roi.X],[roi.Y]); You don't even need to remove the trailing nans. :)

4 years ago | 0

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how to turn netcdf into contour map
Hi Abigail, The first thing I do with a netcdf file is type ncdisp('myfile.nc') to see what's inside it. If you have some ...

4 years ago | 0

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Extracting data from matrix
To only plot the ocean data, try masking out the land data by setting those values in A to NaN. like this: A(B==1) = NaN; % se...

4 years ago | 0

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Equal Sized random assortment, using randi?
This would be one way to define how many ones and how many twos in each column before randomizing them: N_cols = 8; % number o...

4 years ago | 0

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PCA Graph of Data Comes Up Blank
I think you're mixing and matching different ways of defining filenames. As a result, dir is unable to find the files you're loo...

4 years ago | 0

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datestr generating different string
How about myy = 2014; mym = 1; myd = 20; datestr(datenum(myy,mym,myd),'dd/mm/yyyy')

4 years ago | 0

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Three column table into matrix
I think table2array is the function you're looking for.

4 years ago | 1

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How to find data points within 2% tolerance of curve
Sounds like a nice homework problem. You'll probably want to use logical indexing to find the indices of the Y data that are w...

4 years ago | 0

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Plotting multiple graphs from multiple ranges in excel
The easiest way is probably to read the full range of data all at once, then loop through the different ranges you want to plot....

4 years ago | 0

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Getting a filter error today when yesterday didn't?
I suspect that yesterday you weren't including x in the filter. Yesterday you were filtering the d signal, which is just [1 0 0 ...

4 years ago | 0

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How do I fix my display of the x and y values? They should be x = 1.15 and y = 3.85.
The double equals is defining x and y as a boolean. It's saying x = 1 if minimum_voltage equals acosd(B/2*A)*5/180. Let's find o...

4 years ago | 0

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How can i create these three images in one figure?
If you're question is about how to make subplots, here's how. figure subplot(3,1,1) plot(sind(1:1e4)) subplot(3,1,2) plot...

4 years ago | 0

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How can I compute the mean value over a time interval?
Hi Anna, welcome to the forum. With these types of questions it always helps if you can provide a minimal working example. But...

4 years ago | 0