Answered

Write a function called valid_date that takes three positive integer scalar inputs year, month, day. If these three represent a valid date, return a logical true, otherwise false. The name of the output argument is valid.

Looks like you are taking the same class as Rahul. Rather than repeat my answer here, I will simply direct you to the link: ht...

Write a function called valid_date that takes three positive integer scalar inputs year, month, day. If these three represent a valid date, return a logical true, otherwise false. The name of the output argument is valid.

Looks like you are taking the same class as Rahul. Rather than repeat my answer here, I will simply direct you to the link: ht...

ungefär 2 månader ago | 0

| accepted

Answered

I need some help in seeing where I am going wrong and how to proceed with writing a particular funciton for a MATLAB course I am taking please.

Some issues: n is a fixed input ... you should not be changing n inside your function. Get rid of that n = n + 1 statement. T...

I need some help in seeing where I am going wrong and how to proceed with writing a particular funciton for a MATLAB course I am taking please.

Some issues: n is a fixed input ... you should not be changing n inside your function. Get rid of that n = n + 1 statement. T...

ungefär 2 månader ago | 1

| accepted

Answered

Use of int vs size_t in mex compilation of C-function dgemm.

If you are linking to the MATLAB supplied BLAS/LAPACK libraries, then all of the integer types being used for arguments to these...

Use of int vs size_t in mex compilation of C-function dgemm.

If you are linking to the MATLAB supplied BLAS/LAPACK libraries, then all of the integer types being used for arguments to these...

ungefär 2 månader ago | 0

| accepted

Answered

For loop to extract every 3rd column out of matrix and assign as variable name

Do not do this! This will only lead to headaches downstream in your code for processing these variables (you will need to use m...

For loop to extract every 3rd column out of matrix and assign as variable name

Do not do this! This will only lead to headaches downstream in your code for processing these variables (you will need to use m...

ungefär 2 månader ago | 1

| accepted

Answered

random generator on level of bytes

Generate random integers and then multiply them by 8 to guarantee that the result is divisible by 8. E.g., something like: max_...

random generator on level of bytes

Generate random integers and then multiply them by 8 to guarantee that the result is divisible by 8. E.g., something like: max_...

2 månader ago | 2

Answered

Calculate sum of series using for

Here is an outline to get you started: a = something; % you put a value here m = something; % you put a value here x = someth...

Calculate sum of series using for

Here is an outline to get you started: a = something; % you put a value here m = something; % you put a value here x = someth...

2 månader ago | 1

| accepted

Answered

Decimal to Binary Conversion

E.g., bstream = reshape(b',1,[]); If you want characters, then bstream = char(reshape(b',1,[]) + '0');

Decimal to Binary Conversion

E.g., bstream = reshape(b',1,[]); If you want characters, then bstream = char(reshape(b',1,[]) + '0');

2 månader ago | 1

| accepted

Answered

How to output a vector/array from a created function

Don't use size(inputVector) for your loop indexing limits since this is a vector. Use numel(inputVector) instead. Also, you sho...

How to output a vector/array from a created function

Don't use size(inputVector) for your loop indexing limits since this is a vector. Use numel(inputVector) instead. Also, you sho...

2 månader ago | 0

Answered

Cpp to Mex conversion

Looks like you have a mismatch with variable types, probably an older piece of code that you are trying to compile on a newer MA...

Cpp to Mex conversion

Looks like you have a mismatch with variable types, probably an older piece of code that you are trying to compile on a newer MA...

2 månader ago | 1

| accepted

Submitted

mxGetPropertyPtr & mxSetPropertySDC C-mex functions

Fast memory efficient alternative to API functions mxGetProperty & mxSetProperty.

2 månader ago | 2 downloads |

Answered

how to solve 'Error using | Matrix dimensions must agree. ' ?

Maybe this line: while (Lia2_One_Three ~= zeros(length(Lia2_One_Three),1) | Lia2_Two_Three ~= zeros(length(Lia2_Two_Three),1)...

how to solve 'Error using | Matrix dimensions must agree. ' ?

Maybe this line: while (Lia2_One_Three ~= zeros(length(Lia2_One_Three),1) | Lia2_Two_Three ~= zeros(length(Lia2_Two_Three),1)...

2 månader ago | 0

| accepted

Answered

Print from C file into Command window via MexFile

"However I would like to print directly from the c-file to Matlab Command Window. Is that possible?" Yes, that is what mexPrint...

Print from C file into Command window via MexFile

"However I would like to print directly from the c-file to Matlab Command Window. Is that possible?" Yes, that is what mexPrint...

2 månader ago | 1

| accepted

Answered

could anyone help me to solve the issue with respect to the code

The syntax of a for-loop is: for k=1:5 % your code here end

could anyone help me to solve the issue with respect to the code

The syntax of a for-loop is: for k=1:5 % your code here end

2 månader ago | 0

Answered

How can I see the filter function implementation code at MATLAB?

In general, if the function has an associated .m file then TMW is willing to show you that much. Also there may be information ...

How can I see the filter function implementation code at MATLAB?

In general, if the function has an associated .m file then TMW is willing to show you that much. Also there may be information ...

2 månader ago | 1

Answered

If else problem for year

All of those if-elseif blocks make the code difficult to read, and difficult to debug as well. I would advise against that appr...

If else problem for year

All of those if-elseif blocks make the code difficult to read, and difficult to debug as well. I would advise against that appr...

2 månader ago | 0

| accepted

Answered

Please how can I store all my matrix?

Maybe use a cell array: channel{i} = [importdata(location)]; Then at the end you can work with the individual matrices as chan...

Please how can I store all my matrix?

Maybe use a cell array: channel{i} = [importdata(location)]; Then at the end you can work with the individual matrices as chan...

2 månader ago | 1

| accepted

Answered

Fast Elementwise Matrix-Multiplications

The element-wise times operation in MATLAB is already multi-threaded. You are not going to beat it by writing your own low leve...

Fast Elementwise Matrix-Multiplications

The element-wise times operation in MATLAB is already multi-threaded. You are not going to beat it by writing your own low leve...

2 månader ago | 0

Answered

Defining velocity over particular time frame

You don't need a loop for the velocity. Assuming I understand that you want the velocity to be linear, you just need a vector t...

Defining velocity over particular time frame

You don't need a loop for the velocity. Assuming I understand that you want the velocity to be linear, you just need a vector t...

2 månader ago | 0

| accepted

Answered

Converting C++ bits packed int** to MATLAB unisgned char mxArray using mex?

Some issues: 1) The signature of mxCreateNumericArray according to the doc is: mxArray *mxCreateNumericArray(mwSize ndim, cons...

Converting C++ bits packed int** to MATLAB unisgned char mxArray using mex?

Some issues: 1) The signature of mxCreateNumericArray according to the doc is: mxArray *mxCreateNumericArray(mwSize ndim, cons...

3 månader ago | 0

| accepted

Answered

Find an optimal solution for a linear system with two inequations

The way you have this problem posed, and assuming by "binary" you mean integer, it can be solved by simple inspection. The max ...

Find an optimal solution for a linear system with two inequations

The way you have this problem posed, and assuming by "binary" you mean integer, it can be solved by simple inspection. The max ...

3 månader ago | 0

Answered

How to formulate the random matrix between real interval?

See the second example in the rand doc here, and use your endpoints of 0.10 and 0.50 instead of the example endpoints of -5 and ...

How to formulate the random matrix between real interval?

See the second example in the rand doc here, and use your endpoints of 0.10 and 0.50 instead of the example endpoints of -5 and ...

3 månader ago | 0

| accepted

Answered

Complex matrix inversion using LAPACK in MEX

I took your code and modified it to be a mex routine that takes a 2D double complex input (caution: no argument checking done!) ...

Complex matrix inversion using LAPACK in MEX

I took your code and modified it to be a mex routine that takes a 2D double complex input (caution: no argument checking done!) ...

3 månader ago | 0

Answered

Simulation of irrational numbers

The random number generators that come with MATLAB have very long periods. You can simply use them to form your ratio and it wi...

Simulation of irrational numbers

The random number generators that come with MATLAB have very long periods. You can simply use them to form your ratio and it wi...

3 månader ago | 0

Answered

Printing out the element values in a mxDouble array (C++ script in Matab)

%d is a decimal integer format for use with short, int, long, etc. This doesn't work with floating point. Try e.g. %f or %g inst...

Printing out the element values in a mxDouble array (C++ script in Matab)

%d is a decimal integer format for use with short, int, long, etc. This doesn't work with floating point. Try e.g. %f or %g inst...

3 månader ago | 0

| accepted

Answered

Runge-Kutta function

Here is some code to get you started. It receives a string from the user for a derivative function of x and t and turns it into...

Runge-Kutta function

Here is some code to get you started. It receives a string from the user for a derivative function of x and t and turns it into...

3 månader ago | 1

Answered

for loop continued fraction

Yes, you can use the formula x(n) = 1 + 1/x(n-1) if you want to use a loop. Just start with x(1) = 1.

for loop continued fraction

Yes, you can use the formula x(n) = 1 + 1/x(n-1) if you want to use a loop. Just start with x(1) = 1.

3 månader ago | 0

Answered

How to sum up multiple vectors, element by element, to recieve one final value?

The numerator is just a simple dot product between two vectors, and the denominator is just a simple sum. Using the fact that a...

How to sum up multiple vectors, element by element, to recieve one final value?

The numerator is just a simple dot product between two vectors, and the denominator is just a simple sum. Using the fact that a...

3 månader ago | 1