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Meg Noah


Last seen: Today Active since 2016

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Answered
Reconstructing Audio from Spectrogram
istfit then wavwrite?

7 months ago | 0

Answered
How do I import a txt file with the white spaces
This seems to work if you don't mind working with a table readtable('file22.txt','whitespace','','delimiter',',')

7 months ago | 0

Answered
Errorbar plotting in MATLAB
vec1 = rand(20,1); vec2 = 20*rand(20,1)-15*rand(20,1); vec3 = 3*rand(20,1); med = [median(vec1) median(vec2) median(vec3)]; ...

7 months ago | 0

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Answered
How to display a percent sign (%) using latex and sprintf
% not using latex loveMetric = 99.99; fprintf(2,'I love matlab: %0.8f %%\n', loveMetric);

7 months ago | 0

Answered
Getting point cloud directly from a 3D CAD STL Model in Matlab
There is a program on matlab central that returns the coordinates x,y,z that are the point cloud https://www.mathworks.com/matl...

7 months ago | 0

Answered
4D plot of 3 vectors and 3D array
In this project, I show a couple of 3D vis techniques https://www.mathworks.com/matlabcentral/fileexchange/71774-create-measure...

7 months ago | 0

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Answered
Best tool for complex classification?
metricvalues = zeros(npts,nvar); % find magnitude and phase of the complex values as metrics % fillup the metricvalues array ...

7 months ago | 0

Answered
RKF method for second order ODE
https://ntrs.nasa.gov/citations/19690021375 Low-order classical Runge-Kutta formulas with stepsize control and their applicatio...

11 months ago | 0

Answered
RKF method for second order ODE
https://ntrs.nasa.gov/citations/19680027281 Classical Fifth-, Sixth-, Seventh-, and Eighth-Order Runge-Kutta Formulas with Step...

11 months ago | 0

Answered
Plotting stacked graphs with diff x-axis together without any gap
I have an example here: https://www.mathworks.com/matlabcentral/fileexchange/70172-space-weather-data-solar-flux-10-7-cm

1 year ago | 0

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Answered
How to convert euler angle(roll pitch yaw) to position(x,y,z)
Position is a separate measurement from roll, pitch, yaw. Position is the location of the entity, such as an aircraft. Typical...

1 year ago | 1

Answered
How to write a function for a certain number of random numbers
If the numbers are supposed to be uniformly distributed, then they are between 0 and 1. So just linearly scale the value 0 to th...

2 years ago | 0

Answered
Hurst exponent in matlab
Here's one way, but you'll have to change it to have pixels as length dimensions: %% *fractalDimension* %% *definition* funct...

2 years ago | 1

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Answered
Initializing multidimensional array and dynamic expansion
If you know the size you want: A = zeros(nrow,ncol); or A = zeros(nrow, ncol1, ncol2,ncol3); etc. Can also initialize to a...

2 years ago | 1

Answered
how to find index of each occurrence of my pattern in a file
This solution will find the lines that contain the whole phrase. The example illustrates how to consider or not consider the cas...

2 years ago | 0

Question


How can uicontrol be used to make an editable dropdown (eg combobox) control?
I'd like to use the uicontrol of matlab and its arguments rather than the uidropdown. But I want the uidropdown functionality o...

2 years ago | 2 answers | 0

2

answers

Answered
How to reverse the order of words in string
There's undoubetly better solutions, but: strtrim(strrep(cell2mat([flipud(split('Hello. I. am. Here.'))']),'.','. '))

2 years ago | 1

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Answered
How to change interval unit of x axis
Here's one way You can do shape downsampling - reshape then sum the lines. I made some data by digitizing yoour plot. It's att...

2 years ago | 0

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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...

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...

2 years ago | 0

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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...

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...

2 years ago | 1

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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...

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...

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 ...

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));

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...

2 years ago | 0

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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, ...

2 years ago | 0

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...

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:...

2 years ago | 1

| accepted

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