Community Profile # Ricardo Duarte

Last seen: 7 days ago Active since 2020

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Calculate distance resulting from an histogram and a specific point
Dear all, I have two matrices that represent longitude and latitude. With those matrices I calculated an histogram and now I w...

1 month ago | 1 answer | 0

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Choose the ideal number of bins in hist3
Dear all, I want to plot a hist3 plot but i'm not sure which is the ideal number of bins that I would need to define. I have ...

2 months ago | 0 answers | 0

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Data points in an imaginary grid cell
Dear all, I have a list of data points in two dimensions that correspond to the coordinates (longitude and latitude) of my vess...

2 months ago | 0 answers | 0

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How to import and read several large csv in matlab
Dear all, I have a huge amont of large csv files (about 170Mb each). I need to open them and use the information in two of the...

7 months ago | 1 answer | 0

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How to convert R code in Matlab
Dear all, I have a extense R code which I would like to convert it to Matlab. Is there any way to do this, a sort of automatic...

8 months ago | 1 answer | 0

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How to align the center of mass of two density functions?
Dear all, I have two density functions which I would like to align their x-axis. I was thinking to align then using the baryce...

12 months ago | 1 answer | 0

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How to calculate probabilities using Bayesian theorem
Dear all, I would like to calculate the probability of A, given B (p(a|b)) which can be done through the Bayesian theorem: p(a|...

12 months ago | 0 answers | 0

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Question

Plotting a %of time vs %of area graph
Dear all, I strugglIeling with this problem for a while already. I have the matrix A(1000x1000x120) which represents noise leve...

12 months ago | 1 answer | 0

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How to create a %of time vs %of area plot
Dear all, I have the matrix A(1000x1000x120) which represents noise levels arranged as (longitude x latitude x time). I want n...

12 months ago | 1 answer | 0

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Question

Misalignment plot with several axes
Dear all, I have the following code that gives me a group of subplots. for k = 1:N CellSELpercentil{...

12 months ago | 1 answer | 0

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Question

How to generate a signal
Dear all, I want to generate a signal similar to the one in the following picture (black line only). How can I do that. I...

1 year ago | 1 answer | 0

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Question

How to obtain the channel impulse response through sound pressure levels
Dear all, I would like to obtain the channel impulse response through the sound pressure level. How can I do that? Is there a...

1 year ago | 0 answers | 0

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Question

Meaning of a code line
Dear all, I have an old piece of code that I'm trying to understand. The line that is confusing me is: eval( [ '!copy ' fi...

1 year ago | 1 answer | 0

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Question

Replace value that are associated to a location by nan
Dear all, I have a question that I hope you can help me. I have a map of sound pressure levels (spl) in which I patched a whi...

1 year ago | 1 answer | 0

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Changing the coordinate system from WGS84 to matlab coordinate system
Dear all, I have a ".nc" file (attached) containing the dolphin dispersion in one specific area which was imported from ARCGIS ...

1 year ago | 0 answers | 0

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Question

How to change the colorbar limits in a previously saved fig file
Hello, I have a figure containing a colorbar that I saved in a .fig format. Now I need to open it and change the limits of the...

1 year ago | 1 answer | 0

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Question

How to increase the performance of a cycle for in its use in large matrices?
Dear all, I have four matrices NewZ(1x20), Longitude(1000x1), Latitude(1000x1) and depthgrid(1000x1000). Note that depthgrid re...

1 year ago | 1 answer | 0

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Question

How to assign a specific values to the nearest X,Y point
Dear all, I have two vectors X and Y which represents the vertices of a delauny triangulation. Additionally I have two other v...

1 year ago | 1 answer | 0

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Question

Interpolation of layers to obtain a layer in the orthogonal plan
Dear all, I have three variables S1, S2 and S3 with the size (1000x1000) all that represent the sound levels in three differen...

1 year ago | 1 answer | 0

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Question

Export matlab variable to be imported in QGis
Dear all, I need to export a 1000x1000 matrix containing sound pressure level of a specific region to be later imported at QGis...

1 year ago | 0 answers | 0

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Question

How to create a heatmap from recorded positions
Dear all, Im trying to create a distribution map (or heatmap) from a table that represents ships positions (see figure). Bas...

1 year ago | 1 answer | 0

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Question

How to link x-axis of two plots in one single plot if they have diferent sizes
Dear all, I have the following plot. Y-axis corresponds to the depth and X-axis corresponds to the range And I have also a s...

1 year ago | 1 answer | 0

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Question

How to obtain a section from a surf plot
Dear all, I have a surface plot that represents the bathymetry of a given surface: x=longitute; y=latitude; z=depth; No...

1 year ago | 1 answer | 0

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Question

Moving points together along a specified path
Dear all, I have a question regarding the displacement of a point through time along a specified path. For example, I created ...

1 year ago | 0 answers | 0

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How to create several figures in a subplot with different axes
I overcame this by doing the following code: ax1=axes; subplot(7,1,k,ax1); imagesc(ax1,Xv,Yv,M); set(gca,'YDir',...

1 year ago | 0

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How to create several figures in a subplot with different axes
Dear all, I'm trying to create a subplot with 7lines and 1 column that plot all of my results consecutivelly. I have this piec...

1 year ago | 2 answers | 0

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Question

Concatenate variables with similar names
Dear all I need to concatenate several variables with similar name. For example: T=cat(3,SPL_A,SPL_B,SPL_C,SPL_D,SPL_E). Th...

1 year ago | 2 answers | 0

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Percentile calculation along time
Dear all, I have a time series analysis in which i should calculate its percentiles. Let me explain: I have 5 matrices (A,B,C...

1 year ago | 1 answer | 0

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Question

Deleted files generated with matlab keep occupying space in the hard drive and I can't locate them
Dear all, I have a tricky question regarding deleting files using matlab. Let me explain. I created a program that generates ...

1 year ago | 1 answer | 0