Question

MOD bug? Or something else?

Seems to be a bug in *MOD*. The values inside the range from 0 to 1 that should result in *MOD* of 0 (or 0 to machine precision...

circa 7 anni ago | 2 answers | 0

Answered

looking for an efficient way to activate all fprintf in the function

Probably not what you are looking for, but a quick way may be to just do a search and replace all (i.e., search for: "fprintf" r...

looking for an efficient way to activate all fprintf in the function

Probably not what you are looking for, but a quick way may be to just do a search and replace all (i.e., search for: "fprintf" r...

circa 7 anni ago | 0

Answered

How to manipulate Plot Legend to show markers and colours seperatly?

It can be done... you will have to do some finagling, but it can be done. Here is an example where we have 2 different datasets ...

How to manipulate Plot Legend to show markers and colours seperatly?

It can be done... you will have to do some finagling, but it can be done. Here is an example where we have 2 different datasets ...

circa 7 anni ago | 7

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

circa 7 anni ago

Solved

Remove any row in which a NaN appears

Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

circa 7 anni ago

Solved

Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

circa 7 anni ago

Solved

Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

circa 7 anni ago

Solved

Swap the first and last columns

Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

circa 7 anni ago

Solved

Determine whether a vector is monotonically increasing

Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

circa 7 anni ago

Solved

Make a checkerboard matrix

Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

circa 7 anni 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 ...

circa 7 anni ago

Solved

Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

circa 7 anni ago

Solved

Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

circa 7 anni ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

circa 7 anni ago

Solved

Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

circa 7 anni ago

Solved

Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

circa 7 anni ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

circa 7 anni 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:...

circa 7 anni ago

Solved

Love triangles

Given a vector of lengths [a b c], determines whether a triangle with non-zero area (in two-dimensional Euclidean space, smarty!...

circa 7 anni ago

Answered

How to check if a file of certain type exists in folder?

You could try doing something like: dir_struct = dir( fullfile(your_path,'*pdf') ); if numel(dir_struct) == 0 % then ...

How to check if a file of certain type exists in folder?

You could try doing something like: dir_struct = dir( fullfile(your_path,'*pdf') ); if numel(dir_struct) == 0 % then ...

circa 7 anni ago | 0

Answered

Plotting lognormal data on this type of graph?

The key ended up being *norminv*. Here is an example output of the program I made (see below for *probit* function): >> pro...

Plotting lognormal data on this type of graph?

The key ended up being *norminv*. Here is an example output of the program I made (see below for *probit* function): >> pro...

circa 7 anni ago | 0

| accepted

Question

Plotting lognormal data on this type of graph?

I would like to plot data on a graph similar to that illustrated in the figure below (except it is upside-down from my conventio...

circa 7 anni ago | 2 answers | 0

Answered

I have a rather large matrix. The data was sampled at 100 Hz. I want to the data to look like it was sampled at 5 Hz

Use *resample* - This is an example of why you may not want to take every Nth amplitude: <<https://lh5.googleusercontent.com/...

I have a rather large matrix. The data was sampled at 100 Hz. I want to the data to look like it was sampled at 5 Hz

Use *resample* - This is an example of why you may not want to take every Nth amplitude: <<https://lh5.googleusercontent.com/...

oltre 7 anni ago | 0

Answered

use FFT in matlab and get phase plot

Here are the frequencies associated with the output from FFT: Nt = % Number of time samples Fs = ...

use FFT in matlab and get phase plot

Here are the frequencies associated with the output from FFT: Nt = % Number of time samples Fs = ...

oltre 7 anni ago | 0

| accepted

Answered

Area of a Spectrum

The area under your curve should just be: N = numel(x); dt = 1/fs; df = fs/N; y = fft(x)*dt; area_y = sum(abs(y))*d...

Area of a Spectrum

The area under your curve should just be: N = numel(x); dt = 1/fs; df = fs/N; y = fft(x)*dt; area_y = sum(abs(y))*d...

oltre 7 anni ago | 0

| accepted

Answered

How to get back complete signal after doing IFFT

Can you provide an example of how you are performing the fft? Something like: a = your_dataset_in_the_time_domain; size_a ...

How to get back complete signal after doing IFFT

Can you provide an example of how you are performing the fft? Something like: a = your_dataset_in_the_time_domain; size_a ...

oltre 7 anni ago | 0

Answered

ifft and fft problem

Did you mean to use "fs_s" instead of "f_s" here: h1_s_hat = abs(fs_s.*ifft(ifftshift(h1_s_FT))); I guess that's why you...

ifft and fft problem

Did you mean to use "fs_s" instead of "f_s" here: h1_s_hat = abs(fs_s.*ifft(ifftshift(h1_s_FT))); I guess that's why you...

oltre 7 anni ago | 0

| accepted