Respondida
Trying to write a function for the inverse of a matrix.
You are missing the part where you append the identity matrix to the right side of A before you start your Gauss elimination. So...

casi 7 años hace | 0

Respondida
mex fortran code containing intrinsic function using Intel fortran compiler
Can you post the offending code? Maybe you are calling it with a non-real argument and the compiler is complaining that it can't...

casi 7 años hace | 0

Respondida
How to re-prompt user input if given incorrect value?
str2double will turn your inputs into numeric, so you will pass your isnumeric( ) test even if there are problems. Instead, chec...

casi 7 años hace | 0

| aceptada

Respondida
Can not use the Fibonacci built in function
For simplicity, let's assume you don't know how many iterations you need in advance. So start with your current code: while x <...

casi 7 años hace | 0

Respondida
Trapezoidal rule in a for loop
You made a good start, but there are several problems with your summation. You don't accumulate into your trapez variable, you ...

casi 7 años hace | 0

| aceptada

Respondida
Why is my own echelon function printing incorrect matrix
I haven't checked all of your code, but I assume this: if ~all(A(k,:))==0 %check to see if row of zeros or not was meant to be...

casi 7 años hace | 0

| aceptada

Respondida
(1/x)>2 . why x<(1/2) is Not the answer
When you multiply (or divide) an inequality by a value, the direction of the inequality changes if the value is negative. So whe...

casi 7 años hace | 0

Respondida
How to compare element between two numbers
Like Rik, I am not sure what comparison you are doing based on your terse description. Maybe this, but it doesn't match your st...

casi 7 años hace | 0

Respondida
[mexFunction in Matlab] printf() function in C code
How you have it written should work, except maybe replace printf( ) with mexPrintf( ). Also, depending on your compiler and sett...

casi 7 años hace | 0

Respondida
How to return the outputs of mexFunction() in Matlab?
Put this at the bottom of your code. But remember that if you call mexErrMsgTxt your mex function will exit immediately and not ...

casi 7 años hace | 1

Respondida
Error: Matrix dimensions must agree
You could use V(2:end) or V(1:end-1) instead of V in that line. Or maybe average the two.

casi 7 años hace | 0

| aceptada

Respondida
Write a MATLAB code to estimate the exponential function. Inputs should be x and n. The outputs must include approximate value, true value, error, absolute error, and relative error.
Put your function code for e_to_x() in a separate file called e_to_x.m somewhere on the MATLAB path. Then put your other code t...

casi 7 años hace | 0

Respondida
Kindly give me the Matlab code for simplex method?
Use the MATLAB supplied function fminsearch.

casi 7 años hace | 0

| aceptada

Respondida
Error when calling the mexFunction
You probably should have gotten a warning from the compiler that your callFun( ) function doesn't return anything, even though t...

casi 7 años hace | 0

| aceptada

Respondida
How to turn assigned vectors into a 3x3 matrix?
Assuming vec3 is a typo, result = [vec1;vec2;vec3]; If you need to, you can transpose the result. If your vec3 is not a typo,...

casi 7 años hace | 0

Respondida
[Create mexfunction from C code] The order of several c files
The order you compile your source code files should not matter (other than the fact that the mex function name will be based on ...

casi 7 años hace | 0

Respondida
When I try to run a function in matlab, I get an error, it is undefined
Put this code in a file called checkEchelonMatrix.m that is on the MATLAB path: function [result] = checkEchelonMatrix(M) %res...

casi 7 años hace | 0

| aceptada

Respondida
Memory erased in mex file
I would highly advise combining your multiple mex routines into one mex routine that you call with a directive (e.g., a string) ...

casi 7 años hace | 0

| aceptada

Respondida
Sort Index - Bug
The sort index gives the location in the original array of the sorted values. I.e., the sort results "a" are "original_array(sor...

casi 7 años hace | 2

Respondida
[Create mexfunction from C code] warning: implicit declaration of function
You call myfunction( ) before the compiler has seen a prototype or definition of myfunction( ). Either move your square( ) and ...

casi 7 años hace | 0

| aceptada

Respondida
Index Exceeds Matrix Dimensions
You have inadvertantly created variables named "dot" and "cross" that are shadowing the MATLAB functions of the same names. Cha...

casi 7 años hace | 0

Respondida
Saving all outputs of for for-loop
Basic steps for you to take would be: Create your range up front, and not as part of the loop indexing. E.g., a t vector Use t...

casi 7 años hace | 0

Respondida
How can we create a vector of length n
There are many ways of doing this. E.g., use the ones( ) function and divide by 10. Or use the zeros( ) function and add 1/10....

casi 7 años hace | 1

| aceptada

Respondida
Create matrix indicating combinations of dummy variables
Variations of this technique are often used, but this can exceed your memory if n gets too large: n = 8; result = dec2bin(0:2^...

casi 7 años hace | 0

| aceptada

Respondida
Solve the limit limx→0
Hint: If you are just looking to get an answer, consider looking at the Taylor Series of each individual term and then ask yours...

casi 7 años hace | 0

Respondida
Filling a matrix without for-loops and ifs
Check out the sub2ind( ) function: https://www.mathworks.com/help/matlab/ref/sub2ind.html?searchHighlight=sub2ind&s_tid=doc_src...

casi 7 años hace | 0

Respondida
Vectorizing evaluation of cell array of functions
Not sure this will be any faster since the loop is just hidden, but you can try this: output = arrayfun(@(x,y)x{1}(y),funcell,i...

casi 7 años hace | 1

Respondida
Wondering if you have any merchandise for sale cause I'd love to look like a part of the MATLAB team ?
How about a MATLAB/Simulink Rubik's Cube? https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=matlab+rubiks&_saca...

casi 7 años hace | 0

Respondida
Is there a matlab function similar to numpy.spacing
From the numpy.spacing doc: "It can be considered as a generalization of EPS ... there should not be any representable number ...

casi 7 años hace | 3

| aceptada

Respondida
What is the best way to insure that all of my functions are using the same constant values?
I use a function that returns a structure, containing the values and the unit descriptions. Your code can either pass this stru...

casi 7 años hace | 4

Cargar más