Community Profile # Darcy Cordell

Last seen: 13 dagar ago Active since 2018

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Question

Removing white space on pcolorm plots (for irregular rotated mesh)
My question is very similar to this one: https://www.mathworks.com/matlabcentral/answers/275814-white-space-in-map-grid To summ...

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Question

How best to convert a (lat,long) network into a "line diagram" in MATLAB?
I have a transmission network with substations in (lat,long) coordinates connected by transmission line segments. I want to plot...

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Question

How to assign elements in a vector to an entry in a structure array variable?
I have an Nx1 structure array which contains a variable: N = 100; S(1).Name = 'Jon'; S(2).Name = 'Phil'; S(3).Name = 'Bob'; ...

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How to access only the first element of the variables in a structure array as a vector?
Not sure I worded this question correctly, but I will try to explain. I have a (1 x N) structure array (S) which contains the f...

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Question

New to filter design: Designing filters at very low frequencies (mHz) on logarithmic frequency scale
I am new to filter design, and I am trying to filter some signals to analyze the frequency content. I would like to look at low-...

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Question

Faster interpolation of 2-D spatial data at different time steps without looping through the time steps?
I have a relatively small number of scattered data point locations (~30) which I want to interpolate onto a uniform spatial grid...

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Question

How to save a fig file and re-open it with the same figure number?
Very simple question which I cannot find a simple answer to: If I save a figure with a particular figure number as a *.fig file...

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Question

Matrix multiplication along a specified dimension?
I have a 2x2xN matrix, A, and a 2xN matrix, X. I want to multiply each Nth 2x2 matrix in A by the Nth 2x1 matrix in X. I can do ...

ungefär ett år ago | 1 answer | 0

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Question

How can I insert many columns into a matrix at different locations efficiently?
I have a matrix in which I need to delete several columns of zeros, perform some operation (i.e. matrix inverse), and then re-in...

ungefär ett år ago | 1 answer | 0

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Question

Is there an easier way to index diagonal elements of a matrix?
Let's say I have a 10 x 10 diagonal matrix of random integers between 0 and 100: A = diag(randi(100,10,1)); I want to replace ...

ungefär ett år ago | 2 answers | 0

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Question

How to convert an image back to a data matrix?
I have a color PNG figure with contours which displays some data matrix as a colorplot. The figure was made elsewhere and cannot...

mer än ett år ago | 1 answer | 0

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Question

How can I stop my Mac showing a new figure window on MATLAB while I am doing something else?
This seems like a very specific weird question that I can't find an answer to anywhere else. I am making lots of figures in MAT...

ungefär 2 år ago | 1 answer | 1

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Question

How can I get randperm to return a permutation of a vector that has no entries at their original positions?
I want take a random permutation of a vector such that all entries of the vector move to a new location. For example, if I have...

mer än 2 år ago | 5 answers | 0

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Question

Why does pcolor require you to transpose the matrix when you give it x and y vectors?
Suppose you have an M by N matrix of data called A. Associated with that data is a vector in the x-direction with length M and a...

nästan 3 år ago | 2 answers | 0

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Question

Why does pcolor not display the full matrix?
There are several questions on here asking why pcolor does not display the full matrix. Most answers say something along the lin...

nästan 3 år ago | 1 answer | 0

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Question

Rendering EPS figures in MATLAB 2020 different than older versions?
I recently updated from MATLAB 2016 to MATLAB 2020a. I am trying to recreate certain EPS figures exactly and then import those ...

ungefär 3 år ago | 0 answers | 0

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Question

Formatting fread binary file (converting from FORTRAN script)
I am converting some Fortran to MATLAB and am stuck early on when trying to load a binary file. I know MATLAB well but I have no...

ungefär 3 år ago | 0 answers | 0

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Question

Why does "tic/toc" output time info before my figure has plotted?
I am using a function to plot a somewhat complicated figure with many subplots and lots of data. I noticed that there was a bit...

mer än 3 år ago | 1 answer | 0

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How to get geoshow to fill inside a polygon rather than outside?

mer än 3 år ago | 0

Question

How to get geoshow to fill inside a polygon rather than outside?
I am using geoshow to plot filled polygons on a map. The polygons represent lakes. I have latitude and longitude coordinates sav...

mer än 3 år ago | 1 answer | 0