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Walter Roberson


Last seen: Today |  Attivo dal 2011

Followers: 42   Following: 0

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I am currently in the middle of moving, so I am not around very much.

Programming Languages:
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English

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  • Most Accepted 2023
  • Most Accepted 2022
  • Solver
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  • Most Accepted 2021
  • Roberson Cup
  • Most Accepted 2019
  • Most Accepted 2018
  • Most Accepted 2017
  • 36 Month Streak
  • Most Accepted 2016
  • Most Accepted 2015

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Risposto
Solve 𝑔 ′ ( 𝑥 ) = 0 for z in terms of N, a positive integer
Let's try... Q = @(v) sym(v); syms f(x) g(x) G(z) syms z positive syms N integer assumeAlso(N, 'positive'); g(x) = 4*N*s...

circa 14 ore fa | 0

Risposto
I want to draw pathline for two particle for a 2d problem
When you use griddedInterpolant, then your x must have all of its columns the same, and the row values must be sorted. Your y mu...

circa 16 ore fa | 1

| accettato

Risposto
plot csv with column names used automatically as x and y label
data = readtable("results.csv","TextType","string"); plot(data, data.Properties.VariableNames(1), data.Properties.VariableNames...

circa 18 ore fa | 0

| accettato

Risposto
How could I make a script for this ecuation where i can solve for f?
syms f epsilon D Re Q = @(v) sym(v); eqn = 1/sqrt(f) == -Q(2.0) * log(epsilon/D/Q(3.7) + Q(2.51)/(Re*sqrt(f))) F = solve(eqn,...

circa 19 ore fa | 0

Risposto
find intervals for both B and C which make the exponential function F converge to some points.
There is no point in calculating most of the F values since we are only interested in convergence. So we only test the last few ...

circa 19 ore fa | 0

Risposto
Attempting to interpolate with interp2 and getting errors about the sample point vector?
[x, y] = meshgrid(0:0.01:1, 0:0.01:1); x = [0 1 1 0]; y = [0 0 1 1]; You are overwriting the grids of data produced by meshgr...

2 giorni fa | 1

Risposto
GPU programming for Mac M1
If I recall correctly, someone posted indicating that they had generated mex C++ code that calls into Apple's GPU routines, and ...

2 giorni fa | 0

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Deciding when to call a Matlab function: Within my symbolic math code, or within my converted numerical code?
Typically you compute in two phases: Symbolic-only phase. Everything that is changeable is generalized as a symbolic variable. ...

3 giorni fa | 0

| accettato

Risposto
translation of Simulink generated integers into a 1-D vector
If you have a fixed number of values to process at a time, use the DSP Toolbox buffer blocks, https://www.mathworks.com/help/dsp...

3 giorni fa | 0

| accettato

Risposto
How to make vectors A1, A2,... A127. Rolling time window.
If you have the Signal Processing Toolbox, you might as well use buffer() https://www.mathworks.com/help/signal/ref/buffer.html...

3 giorni fa | 0

Risposto
How to find the point the graph crosses the x axis
if x(1) == 0 crossing_location = 1; elseif x(1) < 0 %crossing from negative to positive crossing_location = find...

3 giorni fa | 0

Risposto
Trying to create a power factor correction system but no data shows
You have Physical Signals. You need to convert them before Scope. https://www.mathworks.com/help/simscape/ref/pssimulinkconverte...

3 giorni fa | 0

Risposto
Cant show plot on a graph matlab GUI
selectedFunction = app.DropDown.Value; That is going to reply with a character vector even if the Items was initial...

3 giorni fa | 0

Risposto
Is there a way to find the lengths of the contours in fcontour or other?
You can request the ContourMatrix property of the FunctionContour object returned by fcontour . The ContourMatrix contains infor...

3 giorni fa | 0

Risposto
Error in state of SceneNode
txt = sprintf('$T=%.1f^{\\circ}$C'); This will not be an actual degree symbol, but it is close. The LaTeX interpreter does no...

4 giorni fa | 0

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Need help writing a matlab function.
A deliberately clumsy implementation: function appropriate_element_to_return = hw4_problem3(w, n) array_being_indexed = w; ...

5 giorni fa | 0

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Define function for transient transient boundary condition
function Trefrig = Trefrig(state.time) thermalBC(thermalmodel,"Edge",7,... "ConvectionCoefficient",hrefrig,... "Ambie...

5 giorni fa | 0

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Power spectra of bottom pressure at D5, Digital filtering
subplot(3,2,5); % Power Spectral Density (PSD) 및 신뢰구간 계산 [Pxx, F, Pxxc] = pwelch(bottom_pressure, WINDOW, NOVERLAP, NFFT, Fs, ...

5 giorni fa | 0

| accettato

Risposto
How do I add arrows in evolution analysis figure?
You can use annotation 'arrow'. Unfortunately by itself annotation() uses Normalized coordinates -- normalized relative to the f...

6 giorni fa | 0

Risposto
Every time I run this code, I get "Error using plot Vectors must be the same length.
The equation for guassian pulse does not involve complex numbers. https://doc.comsol.com/6.1/doc/com.comsol.help.comsol/comsol_...

6 giorni fa | 1

| accettato

Risposto
Coordinates of objectes in the images
You velocity logic is incorrect. You build up a list of centroids. There can be more than one centroid in any image, and you co...

7 giorni fa | 0

Risposto
Why Is Colon Operator Not Equivalent To linspace Command?
The colon operator is defined to use repeated addition. When the increment does not happen to be an integer multiple of a power ...

7 giorni fa | 0

Risposto
How to customize the markers of the scatter figure, as shown below
Unfortunately, markers are only customizable between a limited number of pre-set shapes. You will need to patch(), as I recentl...

7 giorni fa | 1

Risposto
How to plot 3D radiation pattern together from 2 separated .OGL files data in Matlab
patternCustom() does not accept x y z vectors. patternCustom accepts magE array or vector, and theta and phi vectors. (In the c...

7 giorni fa | 0

Risposto
Non-linear Scale for Radius Axis in a Polarhistogram Plot
polaraxes does not have any way to adjust the scale factor. It does not for example have an RScale property that might (hypothet...

8 giorni fa | 0

| accettato

Risposto
Does R2022b support MISRA C:2012 Amendment 3 (AMD3)?
MISRA C:2012 Amendment 3 support was added in R2024a.

8 giorni fa | 0

Risposto
How to find the position of a number in an array?
You can use the “find” function to return the positions corresponding to an array element value. For example: a = [7 8 8 2 5 6];...

8 giorni fa | 22

| accettato

Risposto
how do I set the property "RemoteConnectivity" == 1
feature("RemoteConnectivity", 1)

8 giorni fa | 0

| accettato

Risposto
Change Line width and Line color in findchangepts function.
After you findchangepts(ACc(:,2),'Statistic','mean','MaxNumChanges',2); then do ax = gca; %if you want to affect the line...

8 giorni fa | 2

Risposto
Plotting with 3 variables
x = linspace(-10,10); z = linspace(-10,10); y = -(2.*sin(z)+x.*cos(z)); plot3(x, y, z) xlabel('x'); ylabel('y'); zlabel('z')...

8 giorni fa | 0

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