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Luis Isaac


Last seen: 2 months ago Active since 2013

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magnification row axis image
Dear I have a (58,28000) integer matrix I would like to visualice so the 58 rows have the same size as the 28000 colums, i.e. ...

5 months ago | 1 answer | 0

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answer

Question


read formated text file
Dear I have a very large file(250 MB aporx) The first 8 lines are administrative information and the rest are the data itself ...

9 months ago | 1 answer | 0

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Generate a plot set
Dear I would like to genenetate about 65 figures Of couse I don't like to see them at first, I only would like to save in a di...

11 months ago | 1 answer | 0

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text in plot with latex interpreter
Dear I would like to write come text in a simple plot using latex codification The plot is here The text in plot is code as...

1 year ago | 1 answer | 0

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finding root of a three variable function
Dear I have a function that depends on three variable f(x,y,z) and I would like to find the root of this function near x0,xy0,z...

1 year ago | 1 answer | 0

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Increase the size of subplot
Dear I have made a plot composed by 4x4 subplot Matlab reduce the size of each subplot to acomodate the plot in the size of my...

1 year ago | 2 answers | 0

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answers

Answered
labels of a box plot in latex format
Many thanks In the same way I would like to change the FontSize of these labels From other answers I try boxplot(RelDiff,'Lab...

1 year ago | 0

Question


labels of a box plot in latex format
Dear I am making a boxplot: Labels={'D5%', 'D10%','D15%','D20%','D25%','D30%','D35%','D40%', ... 'D45%','D50%','D55%'...

1 year ago | 2 answers | 0

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Change de default position of plot
Dear; This a silly question Sometimes when I debug a program I need to plot some of the variables in different figures The fi...

1 year ago | 1 answer | 0

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Question


using numerical values in symbolic expresion
Dear I am very new using symbolic math I have a funcion of two variables syms x y assume (x 'real') assume (y 'real') f=lo...

1 year ago | 1 answer | 0

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Answered
Polynomial curve fitting and equation of a curve from an image?
Hi I not an expert, but probably the better solution is not to use hight order of ordinary polynomials As the shapes a closed,...

2 years ago | 1

Question


write indexes in a plot
Dear I have a matrix P with n rows and two columns, each of the column store the x and y position of a particle. Represent the...

2 years ago | 1 answer | 0

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Form a 3D matrix for a 2d matrix
Dear I have a 3d matrix M3D in which each dimension represent one of the spatial coordinates x, y, z. This spatial coordinates ...

2 years ago | 1 answer | 0

1

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Question


change axis in image
Dear I have generate a 2D image using color map The graphic repersent the modulus of a electric field, where horizontal axi...

2 years ago | 1 answer | 0

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Question


vectorize random walk displacement function
Dear I would like to code a random walk As a part of the program the routine call a function that calculate +/-1 in one of the...

3 years ago | 1 answer | 0

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Question


problem with parfor in a subroutine
Dear; I rather new using parfor computation. The parfor execute a program in a parallel basis, when this program arrive to a...

3 years ago | 0 answers | 0

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Answered
Count number of points around points in a list
Yes, thanks a lot "rangesearch" is the right function to use, although must be complemented with a conversion form cell to matr...

3 years ago | 0

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Count number of points around points in a list
Dear; I have two list of points defined by to array vectors xyz1 and xyz2, both of them are Nx3, where N is the number of point...

3 years ago | 2 answers | 0

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get the index of the n one in a binary vector
Dear, I have binary vector like bv=[0,0,0,0,1,0,0,1,1,1,0,0,1,0,1...] and I would like to get the index in bv of the n "1" For...

3 years ago | 1 answer | 0

1

answer

Question


write dicom rt file
Dear I woul like to anonymize an dicom rt file, but rather than remove the patient IDs I would like to change them to have a co...

3 years ago | 0 answers | 0

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Remove edge to detect a circle
Dear I would like to detect a circle and measure de center and the radius of it Sadly the picture has two zones of different...

4 years ago | 0 answers | 0

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Answered
Finding center of rotation from two sets of points
There is a very elegant solution of this problem using complex numbers in 2D function [S,Theta,t,c]=FindSTR3(c1,c0) % ca...

4 years ago | 0

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How to remove the "Maximum number of function evaluations has been exceeded" prompt when generating random numbers
Dear I am trying to calculate the confidence interval of a quantity using the MC method. For that I calculate n=20000 pseudo...

4 years ago | 1 answer | 0

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Question


vectorize a block matrix calculation
Dear; I want calculate a big matrix composed of blocks, for that I use the following code: k=length(a); ...

4 years ago | 1 answer | 0

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answer

Answered
distance between a point and elements of a matrix
This could be the solution [ny,nx,nz]=size(M3D); [xx,yy,zz] = meshgrid((1:nx)-x,(1:ny)-y,(1:nz)-z); M3D_dist=sqrt(xx....

5 years ago | 0

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Answered
distance between a point and elements of a matrix
Many Thanks Yes it is the second; I am traing to calculate de distance from a point with coordinates (x,y,z) and the indexes ...

5 years ago | 0

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distance between a point and elements of a matrix
Dear; I am looking for an efficient way to compute the distance between coordinates (x,y,z) and the elements of a 3D matrix. ...

5 years ago | 3 answers | 0

3

answers

Question


Problem with parallel computing
Dear; This is the first time I use parfor loop and I trying to run a program on my local computer when I run the program mat...

5 years ago | 0 answers | 0

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Question


Efficient calculation of 3d matrix of distances
Dear; I would like to calculate the 3D matrix of distances between one point an each element of a 3D matrix in an efficient w...

5 years ago | 1 answer | 0

1

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Question


Double the resolution of a vector
Dear I would like to double the resolution of a vector in an efficient way (i.e. vectorizing) I mean, for example for the ve...

5 years ago | 1 answer | 0

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