Walter Roberson
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48.189 total contributions since 2011I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location.
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Can you put matab code in an app for users to edit?
Yes, provided that the app is not being compiled (so the users need a matlab license to execute it.) For all of the possibili...
alrededor de 2 horas ago | 0
I can't graph multivariable function that contains cos function doens't work
Z=exp(X).*cos(Y); Remember that the * operator is matrix multiplication (inner product). Multiplication of corresponding ele...
alrededor de 2 horas ago | 0
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Input arguments to function include colon operator. To input the colon character, use ':' instead
x1k = @(u1k,x1k) exocstrstateFcnCT1(x1k,u1k); That is a function handle y1 = x1k; That copies the function han...
alrededor de 9 horas ago | 0
Using eval function for execute a power flow with DC system embedded
Don't *do* that! casefile = sprintf('case_ieee30_test%d.mat', i); savecase(casefile, baseMVA, bus, gen, branch); And...
alrededor de 10 horas ago | 0
help me to matlab script
sympref('heavisideatorigin', 1) x = @(t) heaviside(t)
alrededor de 14 horas ago | 0
FEVAL Error in Implementing Bisection - Function to evaluate must be represented as a string scalar, character vector, or function_handle object.
that code expects you to pass a function handle as the first parameter.
alrededor de 14 horas ago | 0
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do you have a rate for retirees?
For personal interest there is the Home license. Unfortunately that does not allow access to some of the toolboxes, and is limit...
alrededor de 14 horas ago | 0
What does Sel do in this code?
http://matrix.etseq.urv.es/manuals/matlab/toolbox/mutools/sel.html Very old MATLAB! It looks to me as if is just doing ind...
alrededor de 15 horas ago | 1
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How to select between two identically named built-in functions?
When Mathworks constructs function names it ensures that if there is the same function name, that all except possibly one of the...
alrededor de 21 horas ago | 0
how to save jpeg after compression code ?
save it any way you like, such as using save() into a .mat file, or write the information into different sheet names of xlsx fil...
alrededor de 21 horas ago | 1
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how to generate and precise double value?
randi([0 10], size(x))./10
alrededor de 23 horas ago | 0
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Log Parsing using MATLAB
S = fileread('data_file.txt'); line_matches = regexp(S< '^.*\sharber4797\s.*$', 'lineanchors', 'dotexceptnewline')
alrededor de 23 horas ago | 0
How to get value of X based on a specific value of Y in Graph
x100 = interp1(y, x, 100, 'linear', 'extrap')
alrededor de 24 horas ago | 1
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Bisection Method Error - Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
rtns=makereturns(20,2); 20 x 2 Q = cov(rtns) 2 x 2 a = [0;1]; B = [1;-1]; 2 x 1 each V = a.*Q*a + 2*a.*Q*B*x + B.*Q*B*x^2 ...
alrededor de 24 horas ago | 0
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Unrecognized function or variable 'phload.'
You are passing phload into toploadph, but toploadph is not passing it into FE which needs it. We can also predict that FE is n...
1 día ago | 0
convert a function into optimization expressions
The solvers are not compatible with symbolic work. The problem-based approach does not permit you to inject your own functions....
1 día ago | 0
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Function with Non Constant Variable
syms x output = S(3, 1, x, 2); disp(output) output = S(3, 1, 4, 2); disp(output) function SF = S(F, a, x, n) if isa(a, '...
1 día ago | 0
Function with Non Constant Variable
syms x output = S(3, 1, x, 2); disp(output) output = S(3, 1, 4, 2); disp(output) function SF = S(F, a, x, n) if isa(a, '...
1 día ago | 0
Error in entropy function
The entropy function only permits a single parameter. You are probably thinking of the wentropy function, which does permit 'sh...
1 día ago | 0
Invalid use of operator.
The syntax for anonymous functions is @(list of variables) body Instead you have @(expression) -Tsf
1 día ago | 0
how can I change a character string from low case to upper case without using the formula of 'low()' and 'upper()' ?
Subtract 32 from the character code. Which you might want to phrase as variable - 'a' + 'A'
1 día ago | 0
Help with ODE45 Running Forever
For t1 you have a sin wave with frequency 17563117453.348 being integrated over 0 to 10*pi . This is a quite high frequency and ...
1 día ago | 0
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Index in position 2 exceeds array bounds
4027.93116292808 - 3784.63252459062i That is not two columns: that is a single column that is complex-valued. signal = csv ./ ...
1 día ago | 0
Can i run matlab on i3 (dual core) with SSD and 8GB RAM
Yes, MATLAB will run on a dual core i3 with 8 Gb and SSD. Four core or more is recommended but it will run on two core https://...
1 día ago | 0
How to find the x and y values at the max of a curve?
CBE350HW10PT1 %invoke the function function CBE350HW10PT1 tspan = [0,2000]; conc = [0.02,0,0]; [t, c] = ode45(@odefun3,ts...
1 día ago | 1
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When i tried to change the training function in nntrain , from trainlm to traindx, i get the error :
The message is correct. Mathworks does not supply any function named traindx . It does, however, supply a function named traing...
1 día ago | 0
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Numbers in command window printed 10000 times smaller
My recommendation would be that you go into Preferences -> Command Window -> Text Display, and choose numeric display "long g",...
1 día ago | 0
more then one tag on object in figure
No. The Tag field of an object must be a character vector or a scalar string. The only way to store multiple tags would be to en...
1 día ago | 0
How to check whether the function invertible or not?
If all you are given is a function handle, and you are not permitted to examine the source code, then it is not always possible ...
1 día ago | 0
Execution time of functions used in anonymous function creation
What is the best way to force immediate execution of a function that is being used as part of an anoymous function? stackAnalye...
1 día ago | 0
| accepted
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