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Chad Greene


Last seen: Today

NASA Jet Propulsion Laboratory

1.234 total contributions since 2012

I am interested in the floating ice shelves that fringe East Antarctica. My current work is toward building a better understanding of how climatology influences glaciology via oceanography. I also have some experience with the acoustics of gas hydrates and oceanic methane bubbles.

Homepage: www.chadagreene.com
Professional Interests: Antarctic ice shelf dynamics, sea level rise, underwater acoustics, methane hydrates

Note: I will not do your homework for you and I will not respond to emails directing me to a question posed on the Answers forum.

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Contributions in
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Answered
Multi Surface Plotting & Color Control of each surface
Try setting the facecolor option using the RGB values. Here are a red [1 0 0] and a blue [0 0 1] surface, using built-in example...

ein Tag ago | 0

Answered
How to make variable matrix?
In Matlab, the first index of any variable is 1, so T(0) will produce an error. Try T(1) to T(n+1).

ein Tag ago | 0

| accepted

Answered
Ackley Function 3D plot
It looks like the code stops at the line that says return. Try putting the function at the bottom of the script and ending it wi...

ein Tag ago | 0

| accepted

Submitted


anomaly
shaded line plots for anomalies

3 Tage ago | 18 downloads |

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Submitted


BedMachine
Some tools for working with data from Morlighem et al.'s BedMachine data for Greenland and Antarctica

4 Tage ago | 17 downloads |

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Answered
Uniformly distributed random variables
Ah, this is a fun question, because the concept it's getting at is quite common across science and engineering. The process of...

10 Tage ago | 1

| accepted

Answered
How to select the starting point of a curve and tare all x, y plot data to this point
Perhaps you could find the index of the location where the chage in Y exceeds some critical threshold. You'll have to manually t...

10 Tage ago | 0

| accepted

Submitted


Climate Data Toolbox for MATLAB
A set of low-level functions and tutorials for analyzing and displaying Earth science data.

11 Tage ago | 308 downloads |

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Answered
Contour plot of spatial distribution of temperature
The regular quarter-degree spacing of the data suggests that no interpolation is necessary for this dataset--it just needs to be...

11 Tage ago | 0

Answered
Calculate mean of gray Value
Try this. Below I'm creating an example matrix M, and calculate the mean of only the values that exceed zero: M = peaks(100); ...

15 Tage ago | 1

Answered
Interpolation or meshgrid...Error using matlab.internal.math.interp1
Ah, it looks like tt_sort and tt2_sort are in fact sorted, but they contain some duplicate values. The easiest way to work aroun...

17 Tage ago | 0

Answered
Median filter for an imported Excel file (removing spikes from a signal)
For a 3-point moving median, you can medfilt1 as you suggest, like this: weg_f = medfilt1(weg,3); Or similarly, you could us...

18 Tage ago | 0

| accepted

Answered
How to extract specific parts of a matrix
Let's see if I understand what you're trying to do. As I understand it, you have a 512x512 matrix with lots of values of 98 on t...

20 Tage ago | 1

| accepted

Answered
Plotting the trend line without plotting the data
Or more simply, polyplot(wspd_3yr,msid_3yr) using the polyplot function found here.

21 Tage ago | 0

Answered
trend line plotting question
I've written a simple function called polyplot to add a linear trend line to plots. Get it on the File Exchange here.

21 Tage ago | 0

Answered
How to Plot Time Series Data of a Temperature Map
Hi John, A couple of things: Location number 7 is in Antarctica! The sea surface temperature data is all NaN on land, so ave...

21 Tage ago | 1

| accepted

Answered
Climate Data Toolbox: how can i calculate correctly a trend with trend function?
Hi Alessandro, I think you've mostly got it. One key point to note is your sampling frequency is monthly, so 12 times per year...

21 Tage ago | 0

| accepted

Submitted


trend
Fast function for mapping trends along any dimension in 3D data.

21 Tage ago | 26 downloads |

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Answered
Making a Map Image from a Matrix
With the Climate Data Toolbox you could do it like this: T = flipud(reshape(load('TS20040101.txt'),[72 144])); % loads, reshape...

etwa ein Monat ago | 2

| accepted

Answered
Control Text Label on plot with categorical axis
Have you tried using the 'vertical' and 'horizontal' alignment options? plot(5,6,'o') text(5,6,'default text') text(5,6,'ab...

etwa ein Monat ago | 1

| accepted

Answered
Calculating values of a dependent variable at a using a range of independent variables
Welcome to the world of Matlab, Tom. Indeed, I think this is pretty straightforward. To make a range of values of Temp between...

etwa ein Monat ago | 0

| accepted

Answered
Mapping sea surface temp with specific location? Struggling with geoshow function?
For 3D data cubes of things like ocean temperature, you most often need to permute the first two dimensions when reading in from...

etwa ein Monat ago | 1

| accepted

Answered
how to fill geographic plot region with specific color?
To fill the circle, check out the markerfacecolor option in the documentation for geoplot. Alternatively, you may prefer the geo...

etwa ein Monat ago | 1

| accepted

Answered
Error with plotting a function
Try this: plot(t,(K.^(1 - (exp(t.*r.*-1)))), '-b'); I put a dot (.) before the exponents and multiplication. That turns it in...

2 Monate ago | 0

Answered
How to create a best fit line here?
It looks like the first x value is -Inf. Try eliminating that point from the polynomial fit, like this: p = polyfit(x(2:end),y...

2 Monate ago | 0

| accepted

Answered
How do I set each legend on the curve in multiple plot?
Perhaps the issue isn't the legend, but plotting the desired colors? How about specifying the colors of the plots explicitly, li...

2 Monate ago | 1

Answered
How do I smooth a dataset without built in functions
It's not quite empty--it's just plotting a single point as a tiny dot. That's because you've only solved for a single point. I...

2 Monate ago | 1

Submitted


crameri perceptually uniform scientific colormaps
Perceptually uniform scientific colormaps from Fabio Crameri.

2 Monate ago | 65 downloads |

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Submitted


gif
An easy gif generator

3 Monate ago | 117 downloads |

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Submitted


COVID19
Mapping coronavirus cases in the US

3 Monate ago | 10 downloads |

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