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Robert Daly


Australian Water Quality Centre

Last seen: 2 dagen ago |  Active since 2021

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Answered
Display/highlight specific pixels of in image
I am thinking you can't use imshow to plot individual pixels on top of an existing image. You need a full raster matrix. Here a...

7 maanden ago | 0

Answered
Searching for the nearest point on a grid using dsearchn
Well this is embarrassing... the answer is it does work. The problem was some sloppy programming, I reused the NearestPoint var...

7 maanden ago | 0

| accepted

Question


Searching for the nearest point on a grid using dsearchn
I am trying to compare field data with classified sattellite imagery. What I am aiming for is to find the nearest pixel in the ...

7 maanden ago | 1 answer | 1

1

answer

Answered
Scale patch objects relative to plot Zoom level
To answer my own question... I modified the function to store the important data to recreate the arrows in each patch as "UserD...

ongeveer een jaar ago | 0

| accepted

Question


Scale patch objects relative to plot Zoom level
I have a function to plot wind speed with directional arrows overlayed on top. Each arrow is created using a patch object. To ...

ongeveer een jaar ago | 1 answer | 0

1

answer

Answered
Plot of windspeed and wind direction in time series
I wrote this function that gives similar output. The arrows go a bit wierd if you zoom in so it is best to plot only what you w...

ongeveer een jaar ago | 0

Answered
how to convert wind direction to degrees?
Updated answer using the dictionary data type added since R2022b. Intro to dictionaries blog Dictionaries are vectorised so you...

ongeveer een jaar ago | 0

Answered
How to smoothen or interpolate an array of data if I cut out some parts of it?
I get the idea that maybe you have some bad data points you would like to get rid of and then fill with interpolated data. I wo...

meer dan een jaar ago | 1

Answered
Convert x y coordinates and z data to Matrix
I would use interpolation to convert to a regular grid. scatteredInterpolant is the funtion to do this with your irregularly sp...

meer dan een jaar ago | 0

Answered
Reshape or convert vectors to use it with pcolor
pcolor or contourf need gridded data to plot. What do you mean when you say "filling a gid is not optimal since the original g...

meer dan een jaar ago | 0

Question


Video Reader: Failed to initialize internal resources
I am trying to read an MP4 video file from a GoPro camera. The following error shows up when using VideoReader... v = VideoRea...

meer dan een jaar ago | 1 answer | 0

1

answer

Answered
Using trapz to calculate the area under part of the whole pulse where y is not zero
I would run traps on the peak data set between the two end points. Then I would run traps using a line between the two endpoint...

bijna 2 jaar ago | 0

| accepted

Answered
Convert Matrix to ArcGIS raster
Following on from KSSV in the comments... You can export the data to a netCDF file then import that in ArcGIS. To define the c...

ongeveer 2 jaar ago | 1

Answered
Sub-sampling the minimum number of points to accurately reproduce a curve
I had the same question as Michael, here is the best solution I have found. Line Simplification - File Exchange - MATLAB Centra...

meer dan 3 jaar ago | 0

Answered
Save as xlswrite file in user specified path and user specified name
You didn't say anything about how yuor data is stored But something like this... writematrix(data,'FileName.xlsx','Sheet','use...

meer dan 3 jaar ago | 0

Answered
How to calculate mean wind direction
I needed a solution that would ignore NAN values in the data. Converts the direction data into X & Y vector components, average...

meer dan 3 jaar ago | 0