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Ole

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63 total contributions since 2014

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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 ...

25 Tage ago | 1 answer | 0

1

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 =...

etwa ein Monat ago | 0 answers | 0

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...

etwa ein Monat ago | 1 answer | 0

1

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 Monate ago | 0 answers | 0

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...

7 Monate ago | 1 answer | 0

1

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 Monate ago | 1 answer | 0

1

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 Monate ago | 1 answer | 0

1

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 Monate ago | 1 answer | 0

1

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....

10 Monate ago | 1 answer | 0

1

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...

10 Monate ago | 1 answer | 0

1

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 Monate ago | 1 answer | 0

1

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...

11 Monate ago | 2 answers | 0

2

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); ...

etwa ein Jahr ago | 2 answers | 0

2

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]; ...

etwa ein Jahr ago | 1 answer | 0

1

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'] ...

etwa ein Jahr ago | 1 answer | 0

1

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 ...

mehr als ein Jahr ago | 2 answers | 0

2

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...

mehr als ein Jahr ago | 1 answer | 0

1

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));...

mehr als ein Jahr ago | 1 answer | 0

1

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) + ...

fast 2 Jahre ago | 1 answer | 0

1

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...

etwa 2 Jahre ago | 1 answer | 0

1

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)...

etwa 2 Jahre ago | 1 answer | 0

1

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...

etwa 2 Jahre ago | 1 answer | 0

1

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...

etwa 2 Jahre ago | 1 answer | 0

1

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...

etwa 3 Jahre ago | 1 answer | 0

1

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 ?

etwa 3 Jahre ago | 2 answers | 0

2

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...

mehr als 3 Jahre ago | 1 answer | 0

1

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...

mehr als 3 Jahre ago | 0 answers | 0

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...

mehr als 3 Jahre ago | 1 answer | 0

1

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....

mehr als 3 Jahre ago | 1 answer | 0

1

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); ...

mehr als 3 Jahre ago | 3 answers | 1