9 years ago | 0

| accepted

Answered
how can I join points along a two plots with straight lines?
add at the end something like that: hold on plot(reshape([x,x,x].',1,[]),reshape([ytop,ybot,ytop*NaN].',1,[]))

9 years ago | 0

| accepted

Answered
Please how can I unstack a column of negative and positive values into 2 columns of positive and negative values respectively?
You can compare your data with zero. This will classify your data and you can use it to get what you want. Example based on y...

9 years ago | 0

Solved

Multipliying 2 numbers
Multiplying 2 numbers

9 years ago

Answered
How do I set my axis values down to zero when changing my y-axis to log scale?
There is no zero on log scale. Add one line on the end of your code: ... set(gca,'yscale','log') ylim([0.4, 3]...

9 years ago | 0

Answered
FFT and IFFT Problem (numerically and analytically result is not same)
This is caused by side effects of digital domain # You are calculating circular convolution instead of normal one. To make co...

9 years ago | 0

| accepted

Answered
Creating HDF5 file: How to create a GROUP inside a GROUP?
Use <http://www.mathworks.com/help/matlab/low-level-functions.html Low-Level Functions> such as H5G.create to create custom/nest...

9 years ago | 0

| accepted

Answered
What are the disadvantages of using uppercase 'W' in fopen compared to lowercase 'w'
I guess some memory is used for buffering purposes. There should not be *any* differences in written data. 'W' or 'A' are faste...

9 years ago | 1

Solved

Free-time Equation
Given a 7-day week, an *_nc_* -number of *_tc_* -hour classes, *_ta_* -hours awake in a day, and *_tw_* -hours that you work in ...

9 years ago

Solved

Find longest run
Write a function longest_run that takes as input an array of 0's and 1's and outputs the length and index of the longest consecu...

9 years ago

Solved

Create a Video
Create an avi video of the function surf(sin(2*pi*k/20)*Z,Z) for k=1:100 with an avi "quality" of 5. The standard quality is ...

9 years ago

Answered
What is wrong with my code
Are _TH_max1:3_ scalars, vectors or arrays? _&&_ and _||_ may be used only with scalars. Try: if(all(TH_max1(:) >= 0.4) && ...

9 years ago | 0

Answered
how to find integral for this function
In MATLAB there is a difference between calling |*| and |.*| The same is for |^| |.^| etc. Change * |*| to |.*| * |/| to...

9 years ago | 0

Answered
Using ifft to get the Fourier Coefficient
N=256; X=2*N; L=2*pi; x=linspace(-pi,pi,X); c=0; k = 2*pi*((1:2*N)-N-1)/L; % vectorised y = sin(x); % don't understand w...

9 years ago | 0

Answered
Exporting table to excel
You don't have to join tables before exporting them. You can just create spreadsheet and then add other data in other sheets or ...

9 years ago | 3

| accepted

Answered
Dividing matrix in four parts
A = zeros(210,3); %example split = [40 60 30 80]; A_split = mat2cell(A,split); [B, C, D, E] = A_split{:}; doc mat2...

9 years ago | 0

Answered
Could someone please help me speed up my code?
# If you have to use loop, <http://nl.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html preallocate> variable _RMS...

9 years ago | 1

Answered
How to rank a vector with repeats without MATLAB unique?
Do you want to replicate following behaviour? [~, ~, rank] = unique(data); rank = rank.'; There are thousands of ways...

9 years ago | 0

Solved

center of mass
R is a given matrix with size [n,2]. R(i,:) is interpreted as the 2D-position of a mass point with mass i. Calculate the center ...

9 years ago

Solved

Look Up Mapping
Let the input is A = {[] [] [] [1] []}; B = {'A','B','C','D','E'}; Mapped Output = 'D';

9 years ago

Solved

Return the sequence element III
This problem is related to <http://www.mathworks.com/matlabcentral/cody/problems/42832-segmented-number-sequence Problem 42832>....

9 years ago

Solved

Kaprekar numbers
Test if the input is a Kaprekar number: <http://mathworld.wolfram.com/KaprekarNumber.html>. Return a logical true or false. ...

9 years ago

Solved

Differential equation and events
You have to solve the non-linear time variant differential equation: (cos(y)+2)*y''+atan(y)*sin(0.01*t)^2+y*sin(0.5*t)=0 ...

9 years ago

Solved

Transpose of matrix
Transpose of matrix as per test cases

9 years ago

Solved

Composite Trapezoidal Rule for Numeric Integration
Use the trapezoidal rule to numerically integrate a function, _f(x)_, passed as the first argument, between upper and lower limi...

9 years ago

Solved

Bisection method of finding a root.
Test the bisection algorithm described in Chapter 5 of Steven C. Chapra's textbook, *Applied Numerical Methods with MATLAB for E...

9 years ago

Solved

Fraction of a fraction of a ...
One sort of brainteaser problem is a math problem wherein you are asked what the given fraction of a fraction of a ... number is...

9 years ago

Answered
I have problem of ode45. please help me T_T
1. It seems your function rocket.m represents system of equations dH₁ = H₂ dH₂ = aH₁² + 127530 Verify, if it's what y...

9 years ago | 0

Answered
Problem with categorical arrays
(Copied from comments as suggested.) You are trying to make categorical array from a variable of mixed data types. categ...

9 years ago | 1

| accepted

Solved

Order of things - 4
*This is the last assignment in the _Order of Things_-series. If that past incompleteness kept you from solving it, you may star...

9 years ago