# Kelly Kearney

### University of Washington/NOAA Alaska Fisheries Science Center

Professional Interests: ocean biogeochemistry, ecosystem modeling

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**Content Feed**

'splitapply' syntax to index multiple columns in a timetable

I really wish splitapply did allow you to pass a table as input and apply the same function to each column of that input. Unfor...

meer dan een jaar ago | 1

Accuracy of polygon approximation

Other possible metrics commonly used to measure the error of a polygon simplification algorithm involve comparing the perimeter ...

meer dan een jaar ago | 0

group by indexing discontinuous timetable

Here's one possible solution; it first checks for criteria 2 and then goes back to verify #1. You can probably do it all in one...

meer dan een jaar ago | 0

| accepted

define different color for area

I don't think an area plot allows for multiple colors within a single area object. You could accomplish the color change using ...

meer dan een jaar ago | 0

| accepted

Problem adding a field to a struct via function

Your function doesn't return any output. Modify it to do so: function MeshInfo = generateTriangleCount(MeshInfo) SizeTriangle...

meer dan een jaar ago | 1

| accepted

Name Contour levels outside plot

Using builtin contour-related functions... no, not really. Contour labels are one of the least customizable parts of Matlab gra...

meer dan een jaar ago | 1

Combine data from multiple netCDF files

What are the dimensions of the total dataset? And do you really need to hold the entire thing in memory at once? I think you...

meer dan een jaar ago | 0

How to plot a 3D cube based if i have the coordinates of the 8 surrounding nodes?

To expand on Star Strider's answer, in your example, you've specified a list of coordinates, but you haven't told Matlab how the...

meer dan een jaar ago | 1

| accepted

How to plot a map like this in Matlab?

Do you want to replicate that plot exactly, or just the general concept? If the former, I'd recommend looking at m_map, since i...

meer dan een jaar ago | 0

Matrix math with Datetime arrays

As you discovered, implicit expansion of is only supported for numerical arrays (though I'm not sure where that's documented.) ...

meer dan een jaar ago | 0

Timetable_Averaging values from each month

I don't believe you can use retime to build a climatology; for that, I usually use the splitapply function. Unfortunately, spli...

meer dan een jaar ago | 0

A simple scatter plot from a 2d matrix

Are any of these what you're looking for? a1=rand(5,1)*3; a2=rand(5,1)*3; [x1, x2] = meshgrid(sort(a1),sort(a2)); % sort for ...

meer dan een jaar ago | 0

| accepted

How do I create a for loop with fields of structures?

In your current code, you're saving over P on each iteration of the loop. Instead, save to an array: nt= length(Global_Data.Fi...

meer dan een jaar ago | 0

| accepted

Multiple axes in a subplot

You can achieve the multiple-axis look by layering different axes on top of each other. There are several File Exchange entries...

meer dan een jaar ago | 0

| accepted

transform text data like {'1951:Q4'} with quarterly dates to number x axis of a plot

I'd recommend converting your fdate cell array to an array of datetimes: fdate = datetime(fdate, 'InputFormat', 'uuuu:''Q''Q');...

meer dan een jaar ago | 0

| accepted

How to plot coordinate data to appear solid with lighting effect?

The following example shows a relatively simple way to create patch surfaces that connect each circle to the adjacent one (assum...

meer dan een jaar ago | 0

How do I select data based on multiple indexes?

Assuming that the landwatermask, PerpSurface_saturationflag, and ParSurface_saturationflag matrices are all the same size, and t...

meer dan een jaar ago | 0

Spread monthly data into days

One way to do the expansion... convert your monthly dates to the first of each month, then use dateshift to check which month ea...

meer dan een jaar ago | 2

| accepted

How to reduce data irregularly?

It sounds like you're looking for a line simplification algorithm. These algorithms try to preserve the shape of a polygon or p...

meer dan een jaar ago | 0

How to set plot color for N curves to be a gradient of N color shades between light blue and dark blue (or any other color)?

I suggest reformatting the color-generating function so that instead of returning the entire gradient colormap, it returns only ...

bijna 2 jaar ago | 3

| accepted

Separating 1D data into clusters and counting the amount of elements in each

If the cluster tolerance defines how close points need to be to their nearest neighbor in order to be called a cluster, then you...

bijna 2 jaar ago | 1

| accepted

How to load .mat data from another folder?

The dir command returns the path to each file in the folder field, so you need to append that to recreate the full path names fo...

bijna 2 jaar ago | 2

| accepted

Plotting three axis with one y axis

I like to do this sort of thing the manual way, using my offsetaxis function. It requires a little more manual coding than func...

bijna 2 jaar ago | 0

cutline of a triangular meshed graph

The simplest way to do this is to simply interpolate z for a set of points defined by x = 0 and y = the range of your y-data. F...

bijna 2 jaar ago | 0

How interp2 deal with edges on bicubic interpolation?

interp2 does not extrapolate. By default, it sets any points outside the data bounds to NaN; you can alternatively choose a dif...

bijna 2 jaar ago | 1

Plotting a point in Matlab

If you just want a single point with an arbitrary size, try plot, and play around with the 'markersize' property. Be sure to sp...

bijna 2 jaar ago | 0

How to find graph density in MATLAB for a given graph G?

You can simply calculate the number of non-zero elements relative to total elements in the adjacency matrix: nnz(adjacency(G))....

bijna 2 jaar ago | 0

| accepted

How to Create Plot of Weights at Spatial Locations (Connectivity Map)

There aren't any pre-packaged functions to do this, but it should be pretty straightforward to create a function the calculates ...

bijna 2 jaar ago | 0

| accepted

What should be dimension of surf(X,Y,Z) 3D?

You just need to transpose Z: surf(hw, rw, Z')

bijna 2 jaar ago | 0

How to extract -3 dB diameter from Matrix?

The coordinates of the contour line are saved in the c matrix, albeit in a less than user friendly format. I like using the con...

meer dan 2 jaar ago | 0

| accepted