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Rohit Pappu


Last seen: en dag ago

MathWorks

53 total contributions since 2020

I am an Applications 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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Longest run of consecutive numbers
Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have a = [1 2 2 2 1 ...

en dag ago

Solved


Rescale Scores
Each column (except last) of matrix |X| contains students' scores in a course assignment or a test. The last column has a weight...

en dag ago

Solved


Calculate Inner Product
Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...

en dag ago

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Find MPG of Lightest Cars
The file |cars.mat| contains a table named |cars| with variables |Model|, |MPG|, |Horsepower|, |Weight|, and |Acceleration| for ...

en dag ago

Solved


Find the Best Hotels
Given three input variables: * |hotels| - a list of hotel names * |ratings| - their ratings in a city * |cutoff| - the rat...

en dag ago

Solved


Crop an Image
A grayscale image is represented as a matrix in MATLAB. Each matrix element represents a pixel in the image. An element value re...

en dag ago

Solved


Calculate BMI
Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...

en dag ago

Answered
Climbing Power Equation: how to make a calculation into usable code
To calculate the first derivative of a particular vector X, the syntax is diff(X,1) For the above equation, Pkm = diff(Pkmt,1...

en dag ago | 0

| accepted

Answered
Calculating integration limits of a double integral
For computing the numerical approximation of the above double integral %% Define the major and minor axis of ellipse a = sqrt(...

en dag ago | 0

Solved


Plot Damped Sinusoid
Given two vectors |t| and |y|, make a plot containing a blue ( |b| ) dashed ( |--| ) line of |y| versus |t|. Mark the minimum...

2 dagar ago

Solved


Calculate a Damped Sinusoid
The equation of a damped sinusoid can be written as |y = A.ⅇ^(-λt)*cos(2πft)| where |A|, |λ|, and |f| ...

2 dagar ago

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Solve a System of Linear Equations
*Example*: If a system of linear equations in _x&#8321_ and _x&#8322_ is: 2 _x₁_ + _x₂_ = 2 _x₁...

2 dagar ago

Solved


Verify Law of Large Numbers
If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

2 dagar ago

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Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

2 dagar ago

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Convert from Fahrenheit to Celsius
Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

2 dagar ago

Solved


Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

2 dagar ago

Solved


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

2 dagar ago

Answered
need plotting help with matrix and loops
Minor refactoring of the above code close all clc clf %%Clear the figure window addpath c:\antennas\ewa; l=.68; a=(.00002...

2 dagar ago | 0

Answered
How to represent a complex function in modulo
Intuitively speaking, at line no. 9 stems(abs(c)); is 0 everywhere except at = 0 . = inf . = for all values of Hence a...

3 dagar ago | 0

Answered
x(t)=log(8)[t+Π(t)], t=[1e-4, 10]
% Vector to define t t = [1e-4:0.001:10]; % product of all time instances prod_t = prod(t); % x(t) x = log(8)*(t+prod_t...

3 dagar ago | 0

| accepted

Answered
Reading .gz file
For unzipping a .gz file, gunzip function can be used

4 dagar ago | 0

Answered
Loading a MAT file gives "Cannot read file", yet sucessfuly loads data into memory.
There could be a possibility of the file being corrupted. For further analysis, you can use the MATCAT tool , which is available...

4 dagar ago | 0

Answered
Using python function in matlab
The closing ) is missing in the above code. The correct code would be img, background = py.cv2_rolling_ball.subtract_background...

4 dagar ago | 0

Answered
Curve variation and point detection
%% Location of first peak [pk1,loc1] = findpeaks(Signal, 'MinPeakHeight',0.15) %% Location of second peak subSignal = Signa...

4 dagar ago | 0

Answered
Why does webread() fail to find my host?
webread() might not be able to process the CSV file, directed by the URL. A possible workaround could be D = webread(url, 'tabl...

5 dagar ago | 0

Answered
How to find the gray level of local maxima in an image histogram?
To find the local maxima for the given histogram, FPEAK can be used.

5 dagar ago | 0

| accepted

Answered
How to step through While Loop in Simulink?
Breakpoints can be added to a particular signal using the Add Breakpoint option, under the Debug tab. Addittional documentat...

5 dagar ago | 0

Answered
testing hypothesis that p=alpha at 5% & 1%
To test the hypothesis at various confidence levels, Lilliefors test can be used . Example [h,p] = lillietest(x, 'Alpha', 0.0...

5 dagar ago | 0

Answered
How dilatate an image to get a mask
strel returns a morphological structure element, which is passed as a parameter to imdilate() . Additional information about im...

5 dagar ago | 0

Answered
Matlab code for black-scholes
For computing price of European Call Option using Binomial model, the appropriate technique would be to use Cox-Ross-Rubinstein...

29 dagar ago | 0

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