Answered

Loading multiple images, taking mean of them and subtracting background

change the .png for whatever file extension you are using. Are your image greyscale? If not, it might not make sense to backg...

Loading multiple images, taking mean of them and subtracting background

change the .png for whatever file extension you are using. Are your image greyscale? If not, it might not make sense to backg...

2 years ago | 0

Answered

Alternating up and down in my script to find path through 'maze'

Try this algorithm: Goal:to assign a label to each connected track of 1's on a background of 0's. Procedure: Scan image left t...

Alternating up and down in my script to find path through 'maze'

Try this algorithm: Goal:to assign a label to each connected track of 1's on a background of 0's. Procedure: Scan image left t...

2 years ago | 0

| accepted

Submitted

Asteroid, Baseball, etc. (obj mesh) Projected Surface Area

Calculate the projected area into wind axes for an obj (wavefront) that is a convex hull.

2 years ago | 5 downloads |

Answered

How to filter data by date?

My suggestion is to convert all your times to an new variable of time in matlab's datenum format. A datenum is the number of da...

How to filter data by date?

My suggestion is to convert all your times to an new variable of time in matlab's datenum format. A datenum is the number of da...

2 years ago | 0

Answered

Plotting a smooth curve

First, I added a header to the xlsx file so readtable can be used properly. myData = readtable('Data_help.xlsx'); figure() pl...

Plotting a smooth curve

First, I added a header to the xlsx file so readtable can be used properly. myData = readtable('Data_help.xlsx'); figure() pl...

2 years ago | 1

| accepted

Answered

Errors with my code

You redefined y to zero it out and at a different dimension than t. Also some typos in the annotation. T1=[0:0.001:2]; Y1=(-1...

Errors with my code

You redefined y to zero it out and at a different dimension than t. Also some typos in the annotation. T1=[0:0.001:2]; Y1=(-1...

2 years ago | 0

Answered

Fourrier transform on image

Here's an example - the grid of features is space every 20 meters, the frequency found at 0.05/m corresponds to the frequency of...

Fourrier transform on image

Here's an example - the grid of features is space every 20 meters, the frequency found at 0.05/m corresponds to the frequency of...

2 years ago | 0

Answered

Axes after 2D fft

Some great online references are in the matlab code. Whenever I post links at the top of an answer, the answer gets flagged as ...

Axes after 2D fft

Some great online references are in the matlab code. Whenever I post links at the top of an answer, the answer gets flagged as ...

2 years ago | 1

Answered

flip an array with the use of vectors

a=[1 7 5 9 3 2 4 1]; a(3:6) = fliplr(a(3:6));

flip an array with the use of vectors

a=[1 7 5 9 3 2 4 1]; a(3:6) = fliplr(a(3:6));

2 years ago | 0

Answered

readmatrix with numbers and text from .csv file

The problem is your last line has 5 columns. This seems to do what you're asking, and hopefully will be enough to get you start...

readmatrix with numbers and text from .csv file

The problem is your last line has 5 columns. This seems to do what you're asking, and hopefully will be enough to get you start...

2 years ago | 0

| accepted

Answered

How do I get only the HR out of this .csv

If you post the file, or at least the first 20 lines or so, it would be easier to say which command is best to use. Generally, ...

How do I get only the HR out of this .csv

If you post the file, or at least the first 20 lines or so, it would be easier to say which command is best to use. Generally, ...

2 years ago | 0

Solved

Sum of the Matrix Elements

Add up all the elements in a NxM matrix where N signifies the number of the rows and M signifies the number of the columns. E...

2 years ago

Solved

Convert a vector into a number

This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

2 years ago

Solved

Say something funny

Say something funny, or not. Your solution will be (fully automatically and objectively) scored based on how clever or funny ...

2 years ago

Solved

Find the hypotenuse

Given a and b (the two sides of a right-triangle), find c, the hypotenuse.

2 years ago

Solved

Unit Matrix

Given n, you should return an n-by-n unit matrix. Example: If input is n=2 then A = [ 1 0 0 1 ] If input ...

2 years ago

Solved

Add a row of zeros on top of a matrix

Given a matrix, insert a row of zeros as the top row.

2 years ago

Solved

Remove white space from the string

Remove the white spaces (trailing and leading) from the input variable

2 years ago

Solved

Is it an Armstrong number?

An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

2 years ago

Solved

Given area find sides

In a right angle triangle given area 'A' one arm=x, another arm=2x then find the value of x. For example, area A=400 then ...

2 years ago

Solved

Replicate elements in vectors

Replicate each element of a row vector (with NaN) a constant number of times. Examples n=2, A=[1 2 3] -> [1 1 2 2 3 3] ...

2 years ago

Solved

02 - Vector Variables 5

_eVec_ = _Hello_ ( _eVec_ is a string, which is a vector of characters )

2 years 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...

2 years ago

Answered

How to access folders within a loop

Try this (in absence of the Airport.xlsx files I can't completely test it here) - edit the obsdir back to your folder name where...

How to access folders within a loop

Try this (in absence of the Airport.xlsx files I can't completely test it here) - edit the obsdir back to your folder name where...

2 years ago | 0

Answered

I have a problem with plotting a summation equation, Help me!

Hi. Editing - I had a (3-i) instead of (3+i) in the denominator - it's fixed now: k = 6; f = @(x)sum(sqrt((2*k-3)./((3 + [0:...

I have a problem with plotting a summation equation, Help me!

Hi. Editing - I had a (3-i) instead of (3+i) in the denominator - it's fixed now: k = 6; f = @(x)sum(sqrt((2*k-3)./((3 + [0:...

2 years ago | 1

| accepted

Answered

How can i put this below lines of code in a for loop?

Here's how to do it for png, because that is all I have. Change extension to tif. % Edit this to be your toplevel directory m...

How can i put this below lines of code in a for loop?

Here's how to do it for png, because that is all I have. Change extension to tif. % Edit this to be your toplevel directory m...

2 years ago | 1

| accepted

Answered

How can I store data from an if loop into a 1D vector

This function returns the indices where the peaks for ECG values in time-segments defined by a user-specified threshold functi...

How can I store data from an if loop into a 1D vector

This function returns the indices where the peaks for ECG values in time-segments defined by a user-specified threshold functi...

2 years ago | 0

Answered

Using Read Table with a predefined Table size

Processing difficult text files - here the text file is space delimited with one or more spaces, but has a variable number of co...

Using Read Table with a predefined Table size

Processing difficult text files - here the text file is space delimited with one or more spaces, but has a variable number of co...

2 years ago | 0

| accepted

Answered

Hi, check this question

Two Charges % Two 1 nC point positive charges are located at (-1, 0, 0) m and (1, 0, 0) m respectively. % Write a MATLAB scri...

Hi, check this question

Two Charges % Two 1 nC point positive charges are located at (-1, 0, 0) m and (1, 0, 0) m respectively. % Write a MATLAB scri...

2 years ago | 0