Community Profile

# Swatantra Mahato

### MathWorks

50 total contributions since 2019

I am Application Support Engineer at Mathworks.
Disclaimer: Any articles /ideas/opinions here are my own and in no way reflect that of Mathworks

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How do I receive and use NoteOn messages from a midi device in MATLAB?
Hi Joel, It is my understanding that you want to access the message and note value from the "midimsg" received and use it wit...

8 days ago | 1

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how to solve this equation?
Hi I am assuming you want to solve the equation d = solve(eq1==Th1,eq2==Th2,eq2==Th3,eq2==Th4,Rs,Ld,Lq,kexi); You can try u...

10 days ago | 1

| accepted

I want to use atan2 in my equation. When I use atan2 , I get answer NaN. But when I use 'atan' , i didn't get NaN. Why?
Hi Vishal, You can try with "atan2" after making the following modifications syms alpha1 alpha1_d alpha1_dd real and add th...

2 months ago | 0

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How to simplify a symbolic matrix
Hi Sourav, As mentioned in the documentation for "simplify" there is no universal idea to the simplest form of an expression. Y...

2 months ago | 1

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how to modulate and demodulate dpsk signal using MATLAB
Hi, From my understanding, you are looking to modulate a DPSK signal and demodulate it using MATLAB. You may want to look into...

3 months ago | 0

how to count my steps with my mobile and how can i send it to the coumputer?
Hi ron, Kindly refer to the following links for help with counting steps with MATLAB Mobile and sending the data to your comput...

3 months ago | 0

i have to draw an incircle in a triangle.
Hi Saurabh, Assuming you have calculated the incentre and inradius for the incircle, you can plot the incircle by using the p...

5 months ago | 1

How do I update a plot in a figure without closing the gui and without the plots stacking on top of each other?
Hi, I am assuming that you want to update the plot generated without closing the GUI and without a new plot being created. A n...

6 months ago | 0

Getting UTC time from Posix time - leap seconds
Hi, I am assuming you want to convert posixtime to UTC and take into account the leap seconds. This can be done using the "dat...

6 months ago | 1

Create a mosaic using average color of block given image
Hi, I am assuming you want to get the average of color of each block for each component separately. In your function "myfun" by...

6 months ago | 1

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showing "unable to resolve name yout.getElement"
Hi, The above error message "unable to resolve the name yout.getElement" is shown because the variable yout is not present in t...

6 months ago | 0

How to connect a line between two moving points?
Hi Pablo, Assuming you want to join the points representing the "crank" and the "slide", you can do this in a similar way how ...

6 months ago | 1

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How to compute a definite sum of a vector as an LP constrain
Hi Roeland, I am assuming you want w(t) = sum(x(1:t)) for all values of t from 1 to V. In order to do that you may wa...

7 months ago | 0

Matlab won't solve system of equations
Hi, You may want to recheck the system of equations you want to solve as I can see inconsistencies in eq1-2 and eq3-4 eq1 ...

7 months ago | 0

Minimization of a function using fmincon with no constraints vs. using fminbnd
Hi, Kindly refer to the limitations of the fmincon function below: https://www.mathworks.com/help/optim/ug/fmincon.html#bu...

8 months ago | 0

Unable to write loops for self playing connect4 win conditions
Hi, Assuming you want your code to end execution once the win condition is reached, you can use the return function as follow...

8 months ago | 0

Solved

Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

2 years ago

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

2 years ago

Solved

Vectorize the digits of an Integer
Create a vector of length N for an integer of N digits. x = 123045; x_vec = [1 2 3 0 4 5]; I happened upon a trick ...

2 years ago

Solved

Create matrix of replicated elements
Given an input element x, and the dimensions, (m, n) return a matrix of size m x n filled with element x. Example: Input: ...

2 years ago

Solved

Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

2 years ago

Solved

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

2 years ago

Solved

Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

2 years ago

Solved

Make a random, non-repeating vector.
This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

2 years ago

Solved

Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

2 years ago

Solved

Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

2 years ago

Solved

Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

2 years ago

Solved

Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

2 years ago

Solved

Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

2 years ago

Solved

Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

2 years ago