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Jaime de la Mota

Actif depuis 2017

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How can I construct a Smolyak index Matrix?
Hello everybody. I want to program a Smolyak matrix of indices, as in this article. For that, I need to decide the number of d...

plus de 4 ans il y a | 1 réponse | 0

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Problem with Cholesky's decomposition of a positive semi-definite matrix
Hello everyone. I need to perform the Cholesky decomposition of a positive semi-definite matrix (M) as M=R’R. The usual chol fun...

plus de 4 ans il y a | 2 réponses | 1

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Question

Covariance matrix and principal components
Hello everyone. I have some questions about the use of cov and pca. According to the help (https://la.mathworks.com/help/stats/...

presque 5 ans il y a | 1 réponse | 0

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Question

Dimensional error using PCA
Hello everyone. I have generated a code in which I use a Gaussian correlation kernel to generate 1000 realizations of a stochast...

presque 5 ans il y a | 1 réponse | 0

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Question

PCA expansion random variables
Hello everyone. Right now I am applying PCA to a set of observations. [coeffUV, score_vectorUV, latentUV, tsquaredUV, explained...

presque 5 ans il y a | 1 réponse | 0

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How to avoid painting outside the figure using linewidth
Hello everyone. I am plotting some figures using linewidth. However, in the very example at https://www.mathworks.com/help/ma...

presque 5 ans il y a | 1 réponse | 0

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Question

Question about cropping white space in plot
Hello everyone. Recently I have been generating maps with the code below. However, due to the limitations of my data, said map...

presque 5 ans il y a | 1 réponse | 0

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Problem using geoshow to represent data over geographical map
Hello everyone. I am working with two vectors and a matrix; both vetors represent latitude and longitude. Latitude goes from 70...

plus de 5 ans il y a | 1 réponse | 1

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Question

How can I perform a PCA analysis over 3D data?
Hello everyone. I have a 100*50*20 matrix which contains measurements over an area of space. 100 is the number of latitudes, 50 ...

presque 6 ans il y a | 1 réponse | 0

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Question

Can I use contourf with two matrices?
Hello everyone, I have two matrices if size 9*50.000 called fX and fY, I want to see how they correlate. I have done the followi...

presque 6 ans il y a | 1 réponse | 0

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Question

Problem with for loops
Hello everyone. I have coded a function, however, I cannot reproduce the same result using for loops. Could someone please tel...

presque 6 ans il y a | 1 réponse | 0

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Question

Question about two dimensional PCA analysis
Hello everybody. I have a file containing wind data in directions S-N and W-E for some places and at some times denoted by latit...

presque 6 ans il y a | 1 réponse | 0

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Question

Cannot interpret pca results
Hello everyone. I have generated a code which transforms a stochastic process making it dependant on uncorrelated random variabl...

presque 6 ans il y a | 1 réponse | 0

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Question

ANOVA table without ineraction
Hello everybody. I am trying to construct a ANOVA table using anova2, this is to study if a matrix with 15 rows (which are 5 ...

environ 6 ans il y a | 1 réponse | 0

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Question

Recomendation on plotting data
I have a 360x180 matrix with data for each latitude and longitude on earth, I plot it like this: imagescnan(loni,lati,s...

presque 7 ans il y a | 1 réponse | 0

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Question

Problem using quiver comand
I have two 360*180*12 matrices with meteorological data and it's significance; I want to plot the data and use quiver to draw ar...

presque 7 ans il y a | 1 réponse | 0

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Question

Plotting map over EOF data
I have plotted some measurements in the latitude and longitude in which they have been measured. I want to plot a physical map o...

environ 7 ans il y a | 1 réponse | 0

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Question

How can I represent EOFs?
I have a matrix of 47 lines and 3 columns which show the EOFs at 47 measurement places. I also have two vectors with the latit...

environ 7 ans il y a | 1 réponse | 0

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Question

Problem with colorbar in subplot
I have made the following code for representing physical measurements in the region of Angola for the twelve months of the year....

environ 7 ans il y a | 1 réponse | 0

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Question

Trouble with reproducing same colorbar for different figures
I have designed a program for plotting the standar deviation value of a certain variable measured on different stations on each ...

environ 7 ans il y a | 1 réponse | 0

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Question

Problem marking coordinates over a map
I need to plot some coordinates on a map. I create the map by using: >> worldmap angola >> load coastlines >> plotm(coastlat,...

environ 7 ans il y a | 1 réponse | 0

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