Community Profile

photo

Walter Roberson


Last seen: Today
45.326 total contributions since 2011

I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location.

Contact

Walter Roberson's Badges

  • Most Accepted 2019
  • Most Accepted 2018
  • Most Accepted 2017
  • Solver
  • First Review
  • 36 Month Streak
  • Most Accepted 2016
  • Most Accepted 2015
  • Most Accepted 2011
  • Most Accepted 2012
  • Most Accepted 2013
  • Thankful Level 4
  • Grand Master
  • Revival Level 4
  • Knowledgeable Level 4

View all

Contributions in
View by

Answered
Error: ()-indexing must appear last in an index expression.
You need to use a temporary variable, or you need to use a helper function, or you need to use the subsref function (which has a...

alrededor de 7 horas ago | 0

Answered
How to print Chinese characters using disp
fread the file *uint8pprecision, instead of fileread. Use native2unicode UTF8 to process the byte sequence into characters. Or i...

alrededor de 11 horas ago | 0

Answered
Script termination via uicontrol call function
You have four options to stop a script without its cooperation: 1) you can quit() MATLAB. Note that if you do this then onCle...

alrededor de 11 horas ago | 0

Answered
How to delete a cell in gui
When you get() a property from more than one graphic object, you get back a cell array in response. You are trying to use num2st...

alrededor de 15 horas ago | 0

Answered
Trademark or Copyright symbol
https://en.m.wikipedia.org/wiki/Trademark_symbol I am not certain at the moment that you can use the latex that is shown; pos...

1 día ago | 0

Answered
readtable is not reading the time 12:00:00 AM?
Your input format specification should be 'MM/dd/yyyy hh:mm:ss a' to read that. m is minutes not month H is only for 24 hour ...

1 día ago | 0

Answered
Does there exist a QL decomposition?
https://www.mathworks.com/matlabcentral/fileexchange/16536-qr-rq-ql-lq-factorizations

3 días ago | 0

Answered
Read a function in a GUI
fXr = double(subs(Funcion,x,Xr)); fXa = double(subs(Funcion,x,A));

3 días ago | 1

| accepted

Answered
subplot() to alling different sized graphs on the same figure
subplot(2,2,1) plot f subplot(2,2,3) plot g subplot(2,2,[2 4]) plot f and g together The ordering is across, unlike linear...

3 días ago | 1

| accepted

Answered
Non-integer values inside "Randi" function
random_perturbations = randi([e_min e_max],1,R);] That ] should not be there at the end of the line.

3 días ago | 0

Answered
data excel algorithm genetic
Use readtable() or xlsread() to read the data. Once it is read into MATLAB, MATLAB does not care where it came from, so it becom...

3 días ago | 0

Answered
How do I graph an adjacency list?
Easiest way is to convert the adjacency list into an adjacency matrix. For each entry, set the matrix true at the row number cor...

3 días ago | 1

| accepted

Answered
how to convert Fotran format statment in matlab?
Is the format being used to read data, or to write data? If it is being used to write data, then the equivalent would be fmt =...

3 días ago | 0

| accepted

Answered
Is there a danger in renaming a Matlab install folder
The registry would have been configured to use that path . You might be able to use the File Association Fix contribution in th...

3 días ago | 2

Answered
Old installation key - new Matlab version?
No. Installation keys have never been valid on newer releases than they were issued for. And even if they were, the format of ...

3 días ago | 0

| accepted

Answered
How to fix the bugs in my matlab code?
http://www.codeforge.com/article/174131 has the source code for gvd_curve_pcf2

3 días ago | 0

Answered
Can't figure out the mistake here. Gives me an error at line 5 and 16
Your z is clearly complex valued numeric, but you are trying to use z as an index into an array named f that you are creating. ...

3 días ago | 0

Answered
How do I get the inverse laplace of this time function?
Use the tf2sym function from https://www.mathworks.com/matlabcentral/fileexchange/10816-ovivero-mimotoolbox Transfer functions...

3 días ago | 0

| accepted

Answered
Borrowing license didn't work
The MATLAB license may need to be borrowed as well, unless you have a LNU (Login Named User) license for it on your system. LNU...

3 días ago | 0

Answered
How to rename field in a struct?
In current releases of MATLAB it is not possible to get numeric field names, not even if you load a file written by third-party ...

3 días ago | 0

Answered
Error using optimization tool bx
linprog() does not permit a function handle as the first argument. linprog is linear programming, which permits the problem to b...

3 días ago | 0

Answered
need help with textscan order
S = fileread(Save_Airfoil.txt); S = regexprep(S, '^.*---\s*$', '', 'lineanchors'); dataBuffer = cell2mat(textscan(S, '%f%f%f...

3 días ago | 0

Answered
interp1 find values at axis zero problem The grid vectors must contain unique points.
The below entry numbers ignore the header line (so they refer to array indices) Entry #102 occurs again at #111 Entry #105 occ...

3 días ago | 1

| accepted

Answered
Indexing and iteration problem. Few lines holding me back. Please, HELP!
Em(a,b) your a and b are floating point numbers which cannot be used as indices. Em(ind_am, ind_Am) It is confusing that...

3 días ago | 0

Answered
How to print contents of nested cell array to uitable?
Astr = cellfun(@string, A, 'uniform', 0); Alen = cellfun(@numel, Astr); maxlen = max(Alen); FirstN = @(V,N) V(1:N); Astr =...

4 días ago | 0

Answered
Rounding numbers below 0.7 to 0.7
Recommended: efficiency_final_array = max(efficiency_final, 0.7); For some reason this code never executes the if statement in...

4 días ago | 1

Answered
How to create an infinite matrix?
You cannot. The maximum array size in MATLAB is 2^48 - 1.

4 días ago | 0

| accepted

Answered
Finding the location of particular value
[maxacc, maxaccidx] = max(acceleration); maxaccvel = velocity(maxaccidx);

4 días ago | 1

| accepted

Answered
TCP congestion control algorithm
Is there anyone who could help me to have some suggestion regarding TCP congestion control algorithm. A number of them are desc...

4 días ago | 0

| accepted

Answered
How to get the corresponding data from a table
If the efficiency number is an individual entry stored in the efficiency map, then: eff_number = interp2(X, Y, Eff, speed_of_in...

4 días ago | 0

| accepted

Load more