Question

How to add constraints to simulannealbnd minimization

How to add constraint to minimization problem? Simply x(3) >10*x(4) ConstraintFunction = @simple_constraint; %constraint ...

6 days ago | 1 answer | 0

Question

How to simplify with common expression

How to simplify further ? How to try to pull comomon expression ? syms c d x assume(0 <=x & x <= pi/2 & d>0 & c <0) f =...

15 days ago | 0 answers | 0

Question

Simbolic simplification of trigonometric functions

I have expressions that I do not know how to further simplify with matlab. Which function will at least make the expression mor...

17 days ago | 1 answer | 0

Question

How to get matrix element A{1,2} at indices 1,2 from matrix A =@(x,y)

How to get element with index 1,2 from matrix defined as function. A =@(x,y) [x 1*x 2*x 3*x; y 5 6 7; 1 1 1 1; 2 3 4 5] A(3...

2 months ago | 0 answers | 0

Question

How to use parpool for different expressions ?

This is my first time trying to use parallel computing. Would this code pass Dx1 Dx2 Dx3 Dx4 to different cores and then conti...

6 months ago | 1 answer | 0

Question

How to replace multiple elemets at particular index in vector ?

How to replace multiple elements in particular position inside a vector ? a = [1 2 3 4 5 6 7 8 9] % I would like to replace...

9 months ago | 1 answer | 0

Question

How to plot multiple lines in predefined colors ?

How to plot multiple lines with different predefined colors CM = jet(2); x= linspace(1,10,10); y1 = x.^2; y2 =x.^3; plo...

9 months ago | 1 answer | 0

Question

How to remove the grid from plot

How to remove the grid from a pcolor plot ? grid off does not work. x = linspace(0,10); [X,Y] = meshgrid(x,x); z = X.*Y;...

9 months ago | 1 answer | 0

Question

How to add histogram to series of scattered plot on the same plot?

I would like to add hitogram for each scatter plot. The code below plots in different color each slice of 3 dim scatter matrix....

9 months ago | 1 answer | 0

Question

How to plot scattered data YZ with diffrent color for each slice X of 3 dim matrix XYZ

How to plot scattered data YZ with diffrent color for each slice X of 3 dim matrix XYZ ? There are two F1 F2 matrices (3 dimens...

9 months ago | 1 answer | 0

Question

multiplication question in 3 dim

Let say there is matrix from meshgrid X,Y. How to multiply it through a vector L in building third dimension of a F matrix ? ...

10 months ago | 1 answer | 0

Question

How to read just the powers from matlab output

How to read/print the powers from the matlab output function coeffs ? l^4*w^3*z^1 and l^4*w^3 I would like to obtain numbers...

10 months ago | 2 answers | 0

Question

How to create a histogram without using the matlab function

How to create a histogram without using the matlab hist function. Given scattered data x = randn(1,100); y = randn(1,100); ...

1 year ago | 2 answers | 0

Question

How to get the indices of the values inside every bin i.e. histcounts2

How to get the indices of x and y for the counts that go into every bin. x = randn(1,10); y = randn(1,10); nbins = [8 8]; ...

1 year ago | 1 answer | 0

Question

How to vectorize max / min number in row

Ho to vectorize the min and max value on each row for a matrix a = linspace(2,5,10); b = linspace(0,8,10); A = [a' b'] ...

1 year ago | 1 answer | 0

Question

How to display result from solve ?

How to display the result form solve ? x = @(y)(y^2-4); eqn =@(y) x(y)==0; syms y; S = vpasolve(eqn(y),y) Xr2 = [' R2 ...

1 year ago | 2 answers | 0

Question

Why subs symbolic fails here

How to make subs work for expression that are not identically simplified from the 'simlify' function. The expressions bellow ar...

1 year ago | 1 answer | 0

Question

Symbolic collect and display

I would lie to display the coefficients before the expansion terms of the cos one by one. syms x y f = expand(sin(x + 3*y));...

1 year ago | 1 answer | 0

Question

Rotation of curve question

I am trying to rotate a curve about a point (yellow asterisk) and do not obtain a symmetric result. Xr = (x-XXc)*cos(delta) + ...

1 year ago | 1 answer | 0

Question

speed for loop in sum

Can the for loop be removed ? x=linspace(-2,2,100); %some vector [X,XX]=meshgrid(x,x); %some matrix a=1/2;%some constant A0...

2 years ago | 1 answer | 0

Question

Numerical value for sum of bessel functions

I would like to find as numerical value the sum of bessel functions A0 . Is it possible to speed it ? x= linspace(-2,2,100)...

2 years ago | 1 answer | 0

Question

Conditional 'for loop', simpler ?

Is it possible make a for double loop simpler. x=linspace(-2,2,100); s=1/2; [X,Y]=meshgrid(x,x); A = X.^2; B = Y; for k=1:si...

2 years ago | 1 answer | 0

Question

How to create a circle with segments of specific colors

I am trying to create an image of a circle with inner and outer radius, that is divided radially in segments. The...

2 years ago | 1 answer | 0

Question

Choose a number from counter by key pressing

I would like to have a repeating sequence in time of numbers 1 to 100. When a key is pressed to display the current number a...

3 years ago | 1 answer | 0

Question

Is there a function to draw the cie chromaticity diagram ?

Is there a function to draw the CIE chromaticity diagram ? How to use plotChromaticity ?

3 years ago | 2 answers | 0

Question

How to make 2D rainbow ?

How to make a 2D rainbow plot like https://en.wikipedia.org/wiki/Visible_spectrum#/media/File:Spectrum.svg <https://en.wiki...

3 years ago | 1 answer | 0

Question

How to make a Riemann surface plot of simple analytic functions ?

How to make a riemann surface plot of simple analytic functions ? The code below does not give the correct plots. clear al...

3 years ago | 0 answers | 0

Question

How to write to word file using utf-8 encoding

I cannot save cyrilic to word file. I tried also reading a text file in utf8 but cannot write it with the same encoding. How t...

3 years ago | 1 answer | 0

Question

How to copy only paragraph from text file

I would like to copy a paragraph from text file ( Sample text Sample text). The paragraphs are divided by 1-1 like numbering....

3 years ago | 1 answer | 0

Question

How to display info with mouse over text region inside a figure

Is there a way to display information when you put the mouse over a text region inside a figure. * x = linspace(-3,3); ...

3 years ago | 3 answers | 1