Walter Roberson
Last seen: Today
49,974 2011 年以降の合計貢献数I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location.
Walter Roberson's バッジ
Reach 100000 reputation points. Honors the first contributor to reach this milestone, Walter Roberson
Awarded to Walter Roberson on 14 Aug 2020
The contributor whose answers received the most acceptances in 2019
Awarded to Walter Roberson on 01 Jan 2020
The contributor whose answers received the most acceptances in 2018
Awarded to Walter Roberson on 18 Jan 2019
Solve a problem for the first time
Awarded to Walter Roberson on 10 Jun 2017
Publish your first comment or rating
Awarded to Walter Roberson on 09 Oct 2019
The contributor whose answers received the most acceptances in 2017
Awarded to Walter Roberson on 02 Jan 2018
Contribute at least one answer each month for 36 consecutive months
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2016
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2015
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2011
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2012
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2013
Awarded to Walter Roberson on 20 Jul 2017
Accept 50 answers given by other contributors
Awarded to Walter Roberson on 20 Jul 2017
Reach 25000 reputation points
Awarded to Walter Roberson on 20 Jul 2017
Answer 50 questions that were unanswered for more than 30 days
Awarded to Walter Roberson on 20 Jul 2017
infinite Integration of hyperbolic function
y5=@(x)(4*hh.^2-4.*(x.^2)); y6=@(x)y4(x)./y5(x); You have a division by a constant minus 4*x^2 . But that can pass thr...
27分 前 | 0
How to find the unknown for singular matrix
nulls = null(A); candidates = nulls./nulls(:,1); The columns in candidates should start with 1 ... unless they start with NaN ...
約1時間 前 | 0
How to use "inspect" command in compiled code using MATLAB compiler?
inspect() is a development tool that I would not expect to be compilable . https://www.mathworks.com/products/compiler/supporte...
約5時間 前 | 0
Can I assign a variable to a number in a matrix from another matrix?
A = magic(7) E = eig(A) w1 = E(1,1) w2 = E(2,1) w3 = E(3,1) m1 = 3; m2 = 11; m3 = -7; output = [ m1*w1^2 ...
約6時間 前 | 0
how do I merge multiple matrices into one?
One approach N = 4; %50 in your original Rows = 2; %1111 in your original %generate some data for illustration M = ar...
約7時間 前 | 0
I'm trying to convert Matlab code to C++ or C, but it has some errors. Can someone help me with this?
My adjusted version of the code passes compilation, and produces graphs. However I can demonstrate that the algorithm is wrong. ...
約12時間 前 | 0
I need help with running two for loops
you do not reset dif when you move on to the next j value so the while will end immediately.
1日 前 | 0
closed form solution in a system of equation
There are four families of solutions. [X1 == 1, X2 == (cos(Lz1*h*sin(RootOf(Lz1^2*cos(Z)^2*h^2+cos(Z)^2*Z^2*k1^2-Lz1^2*h^2))/c...
1日 前 | 0
How to import and read multiple .txt files where each .txt file contains multiple number of x,y,z values??
You can use https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.tabulartextdatastore.html Or projectdir = 'name_of_...
1日 前 | 0
Error: Array indices must be positive integers or logical values.
Please read https://www.mathworks.com/matlabcentral/answers/395816-why-do-i-get-array-indices-must-be-positive-integers-or-logic...
1日 前 | 0
Solving one equation with multiple variables
Substitute the first known time and known s(t) to get a linear equation. Do the same with the other two known values. You will e...
1日 前 | 0
fminsearch with 3 variables
example f=@(v)v(1).*v(2)-sin(v(1)+v(2)) Instead of f=@(x,y)x.*y-sin(x+y)
1日 前 | 0
| 採用済み
Array formation and parentheses-style indexing with objects of class 'matlab.io.datastore.ImageDatastore' is not allowed. Use objects of class 'matlab.io.datastore.ImageDatastore' only as scalars or use a cell array. Error in Untitled9 (line 30)
You are trying to index a datastore. Instead you need to create new datastore from indexing the file names. https://progi.pr...
1日 前 | 0
| 採用済み
Undefined function 'x' for input arguments of type 'double'. Why does this flag that particular line and nowhere else? Is there a was to fix it?
y=z(:,1); y=z(:,3); should be x=z(:,1); y=z(:,3);
2日 前 | 0
How do you produce an empty plot if value is higher or lower than given user input value?
y=nan; custom=nan; If you want to produce an empty plot for that case. Your current code will not prod...
2日 前 | 0
Have function use variables within workspace
Normal functions cannot see the variables in the workspace of the caller -- not unless the function specifically asks to look th...
2日 前 | 1
Need help with inverse laplace
syms s tp T assume(T>=0) %THIS X_a=((1/s)-(1/(s+(1/tp))))*exp(-T*s) x_a=ilaplace(X_a)
2日 前 | 0
My while loop and rem function create an infinite loop
You do give a chance for the user to enter x again, so you are testing the same x each time.
2日 前 | 0
| 採用済み
Draw multiple surfaces from different tables(.mat) files. Such that the different .mat files have different Color and names should be displayed on the surface
I already gave you instructions on how to do this, but you did not follow the instructions. Also, you did not deal with the fac...
2日 前 | 1
± use in MATLAB
syms ALPHA syms delta_1 delta_2 assume(-0.008 <= delta_1 & delta_1 <= 0.008) assume(-0.002 <= delta_2 & delta_2 <= 0.002) CL...
2日 前 | 0
Am I Going About This the Right Way?
No. You need to find the location x, y such that the total of (0.5*distance*volume) over each of the customers, is minimized. ...
2日 前 | 1
Solve non-linear equations system parametrically, Why are the answers empty?
There are four solution sets, that look something like [X1 == 1, X2 == (cos(Lz1*h*sin(RootOf(Lz1^2*cos(Z)^2*h^2+cos(Z)^2*Z^2*k...
2日 前 | 0
The limit of a symbolic expression
The limit of constant 0 times f(x) is 0 unless f(x) approaches infinity at the same rate that the constant 0 approaches being 0....
3日 前 | 0
spline interpolation error , index in line 1
spline = spline(t,e_t); After that line spline refers to an array not the function. Use a different variable name.
3日 前 | 0
| 採用済み
Is there a way to get an 8 x 1 matrix instead of 8 x 3 using dec2bin or any other?
string(dec2bin (2 ^ n-1: -1: 0)) This will be considered an array. The entries will be string objects such as "011". The en...
3日 前 | 2
| 採用済み
using symbolic variable with spline interpolations
[~, coeffs] = unmkpp(pp); Splines are not a single equation in the sense of a single polynomial that works from beginning t...
3日 前 | 0
matlab function in simulink
You are in a MATLAB Function Block, so you need to follow MATLAB syntax. MATLAB does not have multiple assignment in the form...
3日 前 | 0
Error using PARFOR: Index exceeds the number of array elements
global variables are not copied to workers when you use Parallel Computing Toolbox, and setting the variable on one worker does ...
3日 前 | 0
| 採用済み
How can we solve this, how to convert mupad to live script?
A = [[2, 1, 1] [3, 4, 3] [3, 5, 4] [2, 6, 5]]; surf(A)
3日 前 | 0
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)