Sagar
The University of Texas at Austin
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Feeds
Discretize countries into regions
First download the shapefile of all countries from here: https://hub.arcgis.com/datasets/esri::world-countries-generalized/abou...
circa 4 anni fa | 0
Fill data with NaN for missing days
I finally did it although using a loop: %create a index column first first_nan(:, 1) = 1:365; %compare the A matrix ...
quasi 8 anni fa | 0
Domanda
Fill data with NaN for missing days
I have a matrix A in which I have number of days in first column and corresponding data in the second column. For example, A (...
quasi 8 anni fa | 1 risposta | 0
1
rispostaDomanda
Combine(mosaic) geolocated Earth data horizontally
Hi, I am processing MODIS level 2 data granules in hdf format. Reading one granule, I get one 203*135 sized 'latitude' matrix, a...
quasi 8 anni fa | 0 risposte | 0
0
risposteDomanda
nanmean gives unexpected results
I am calculating nanmean using two different techniques. I have a matrix avg_terra_aqua1 of size 28*360000. In the first method,...
quasi 8 anni fa | 1 risposta | 0
1
rispostaDomanda
Using horzcat in a loop for combining large number of files
hi, I need to combine 100 matrices horizontally using horzcat. I have a matrix named 'data' of size 20*30*100 in which 100 repr...
circa 8 anni fa | 1 risposta | 0
1
rispostaDomanda
indices when the columns are all nan
I am using [m, d] = nanmax (r_all); to get the maximum values and corresponding indices in matlab. There are several columns in ...
oltre 9 anni fa | 2 risposte | 0
2
risposteFormula for cross-correlation in matlab
It looks like that 'xcorr' does not calculate Pearson correlation coefficient directly. To get Pearson correlation coefficient, ...
oltre 9 anni fa | 0
| accettato
Domanda
Formula for cross-correlation in matlab
When we calculate cross correlation using the function 'xcorr' with 'coeff' option, does the function calculate Pearson correlat...
oltre 9 anni fa | 2 risposte | 0
2
risposteDomanda
hide NaNs in geoshow
I am plotting some data using geoshow as below: geoshow (yy, xx, data, 'displaytype', 'texturemap'); The 'data' has a lot of NaN...
quasi 10 anni fa | 3 risposte | 2
3
rispostePercentage of contribution of multiple factors to a single dependent variable using PCA in Matlab
Unfortunately, PCA may not be the tool for what you are looking for. PCA is more suitable when the number of variables is large ...
circa 10 anni fa | 0
Input for PCA function
Depending on your objective, you can probably consider 'd' as another variable. In such a case, put a, b, c, and d in four colum...
circa 10 anni fa | 0
PCA scaling and centering documentation wrong?
You got it little wrong. When you do PCA(Y), by default, PCA again centers the data. So if you want to get the same values as PC...
circa 10 anni fa | 0
Distinguish between 2 variables using PCA
PCA can certainly give some insights in your problem. Run PCA in your data and look at the different principal components. In yo...
circa 10 anni fa | 0
pca: missing first pc
Your question is not clear, pca(X) will give coefficient matrix whose first column represents coefficients of the first principa...
circa 10 anni fa | 0
| accettato
Interpreting outputs of pca function
In short, you cannot attribute one principal component to a particular variable, because by definition, a principal component is...
circa 10 anni fa | 0
Domanda
cross correlation using 'xcorr' in the presence of NaN or missing values
Hi I am trying to calculate cross correlation of two time-series at different lags but my data have a lot of NaN values. When I ...
circa 10 anni fa | 2 risposte | 0
2
risposteDomanda
using 'als' algorithm in pca
I am doing PCA using 'als' algorithm as below. When I specify a specific number of components (1 here), the 'explained' term giv...
oltre 10 anni fa | 1 risposta | 0
1
rispostaDomanda
nancov gives strange results
I have a standardized matrix (aod_normalized) of a variable whose size is 3653*12, where 3653 is the no. of observations and 12 ...
oltre 10 anni fa | 1 risposta | 0
1
rispostaplotting lat, lon, altitude, variable
Never mind! I was able to plot as I wanted with a small tweak. This is what I did: load ('coast.mat'); long (lo...
oltre 10 anni fa | 0
Domanda
plotting lat, lon, altitude, variable
I have 3 vectors of latitude, longitude, and elevation respectively. I also have a corresponding 3d matrix of size latitude*long...
oltre 10 anni fa | 4 risposte | 0
4
risposteDomanda
how to run a function in each cells?
Hi, I am using a function 'taylordiag' as follows: [ hp, ht, axl ] = taylordiag ( stn { 1 } (2, : ), stn { 1 } ( 3, : ), stn {...
circa 11 anni fa | 1 risposta | 0
1
rispostaDomanda
How to calculate correlation coefficient between two 3-d matrices?
This is often required in analyzing climate data from netcdf files. Climate variables are stored in 3-d matrix (lat, lon, time)....
oltre 11 anni fa | 2 risposte | 0
2
risposteDomanda
How to rotate entire 3d data with x,y,z values along a particular axis (say x axis)?
I need to rotate my 3d dataset defined by x,y,z coordinate along x axis at a specified angle (say 45 degree). This kinds of rota...
oltre 11 anni fa | 2 risposte | 1
