Community Profile

# Robert U

Active since 2016

no additional public information

Programming Languages:
MATLAB
Spoken Languages:
English, German

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How can I change a pixel image from black and white to red & blue
Hi Yik lok Chan, one way to do so is to utilize colormap()-command: corn_gray = imread('corn.tif',3); imshow(corn_gray) ...

10 days ago | 0

How to give a piecewise function as input
Hi Mehul kumar, Please, have a look here: https://de.mathworks.com/matlabcentral/answers/359268-making-ramp-and-unit-step-funct...

11 days ago | 0

save rows from an array
Hi samuel herrera, I guess, you would like to store the content of the cell array vo in vp1 and vp2, respectively. You have to ...

12 days ago | 0

Unintended plot while using the cylinder function
Hi Kevin Hanekom, it seems your vector PStress has two colums which are both interpreted as radius by the function cylinder and...

1 month ago | 0

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Solved

Is my wife right?
Regardless of input, output the string 'yes'.

2 months ago

Solved

The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

2 months ago

Using symbolic variables, how do you expand polynomials to show complex roots in an equation
Hi bob, I guess it's a transfer function and you are looking for poles and zeros. syms s Num = 10^4*(s+5)*(s+70); Den = s*(s...

2 months ago | 0

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multiple graphs in one script
Hi basim almutairi, Simplify your life and use handles (start here: graphics-objects): figure handles, axes handles, ... Handl...

3 months ago | 0

I don't know how to avoid eval
Hi Wan Ji, you can use cell-arrays. You don't need to assign variables with different names to multiple outputs. function p = ...

3 months ago | 2

How to set common colorbar for multiplots?
Hi UTKARSH VERMA, have a look at caxis(): [x, y] = meshgrid(0:0.1:1,0:0.1:1); z = rand(11,11,24); minColorLimit = min(min(...

3 months ago | 1

| accepted

How to converting cell to matrix for image based classification?
Hi Nikhat Ali, Please have a look into documentation fitcecoc(). The way you call the function is not working since data format...

3 months ago | 0

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Matrix of transfer functions
Hi Davood Raoofsheibani, you can define arrays of transfer functions similar to numeric arrays by using tf(): % define array ...

5 months ago | 0

Convert a Complex Number to exponential real
Hi Jogger, have a look at Euler's formula (https://en.wikipedia.org/wiki/Euler's_formula). x = 2 + 1j * 5; r = sqrt(real(x)^2...

6 months ago | 1

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Different rotations of XLabels
Hi Julie, One way to rotate single XTickLabel Strings is to replace them by text(). Advantage over annotation() is that the tex...

6 months ago | 0

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How to shift entries in a vector by the value of the number in that entry?
Hi Tim David, you can apply circshift() to the data. T = [0, 0, 4, 0, 7, 0, 0, 5, 0, 9]; shiftme = @(A,nShift) circshift(A,...

9 months ago | 0

use vector as input
Hi Vincent Degonda, Your for-loop call is not providing what you expected. Your input variable is a vector already. dpb tried t...

9 months ago | 0

Pass a structure to a function
Hi George Bashkatov, First of all: Do not use global variables if not absolutely necessary. There are hundreds of threads argui...

9 months ago | 0

Does Matlab solver allow integration?
Hi Craig Dekker, please, have a look at the documentation symbolic int(): syms t L R Vo WR = R*((Vo/R)*exp(-t/(L/R)))^2 iWR ...

10 months ago | 0

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How to keep decimal float point only
If it is just for display you can specify the output format in fprintf. a = 323.153; fprintf('<< a = %.0f.\n',a) output: << ...

10 months ago | 0

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How to join a double variable and a strucure variable to plot a heat map ?
Dear Niraj Bal Tamang, According to documentation heatmap() supports tables among others. Working with tables is very convenien...

10 months ago | 0

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plot repeating x values
Hi Christopher Tran Rojas, you have to replace the xTickLabel-Strings. Otherwise an increasing value vector is expected. Plus, ...

1 year ago | 0

Frequency domain and Shannon limit
Hi long le, Matlab documentation is quite nice since it provides several examples on key topics. One possibility to transform t...

1 year ago | 1

Catching a warning to avoid matrix singularity
Hi Mostafa Nakhaei, quite similar to what you describe is shown in the documentation: https://de.mathworks.com/help/matlab/ref/...

1 year ago | 1

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How can I get an upright mu in math with latex interpreter?
Hi Philipp Rehlaender, It seems, there is no straight-forward way to do that in matlab figures. Nonetheless, there are work-aro...

1 year ago | 0

Magnitude and Phase response of a Lowpass filter
Hi Suvvi Kuppur Narayana Swamy: The function angle() is calculating the phase angle of a complex number. Since all values are r...

1 year ago | 0

Interpolating at vertices of a mesh
Hi Sanwar Ahmad, for interpolation between meshes you can have a look at the built-in function scatteredinterpolant(). More in...

1 year ago | 0

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How to estimate the parameter in a customized transfer function
Hi Lihao Zheng, first of all you can convert the two forms from one to another. Second it is possible to define transfer functi...

1 year ago | 0

filesep for window '\', which may cause sprintf doesn't work for some '\%d' string, how can i avoid ?
Hi Huang Chi-En, please refer to sprintf-documentation; special characters might need different syntax. Since backslash is an e...

1 year ago | 0