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David Harra
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Can't integrate function using Matlab
I am trying to do a basic integration of a formula for 4 different values. After doing a bit of reading, apparently I need to cr...
oltre un anno fa | 2 risposte | 0
2
risposteDomanda
Plot Different Line Styles using a for loop plot
I am Trying to creat a plot that has 4 different curves and each curve has a different line style. I have tried a number of way...
oltre un anno fa | 1 risposta | 0
1
rispostaDomanda
How to locate X value for a given Y value
I have Data which is Time along the x-axis and amplitude along the y -axis. I want to know the exact time at a given value ...
oltre un anno fa | 2 risposte | 0
2
risposteDomanda
Error with plot command
I am just trying to do a basic plot but I can't seem to get it to work. I keep getting an error saying "Index exceeds the numb...
oltre un anno fa | 2 risposte | 0
2
risposteDomanda
How to tell if random points are in the same feature or not
I have a vornoi diagram populated with random points of 2 arrays. From each of the points I can calculate the distance between...
quasi 2 anni fa | 1 risposta | 1
1
rispostaDomanda
Create line of pixels on an image
I am trying to achieve the Two Point Correlation function for a distribution of grain sizes. As a practice example, I have gen...
quasi 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Can not envelope my data
I was looking to envelope my data so I can get the peaks and do some FFT on the data but when I go to envelope my signal I get a...
quasi 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Using Data to reconstruct an image
I have 2 images of grains, one that contains smaller and one that contains significanlty larger. Each material is achieved via a...
circa 2 anni fa | 1 risposta | 0
1
rispostaDomanda
How to plot 3D plot from polar plot
I am looking at plotting the the slowness profiles of Titinium (Inverser of velocity) by solving the christoffell equation. I h...
circa 2 anni fa | 1 risposta | 1
1
rispostaDomanda
How to get centre frequency of a pulse
I have an A-scan coollected from a simulation. I am trying to obtaon the the centre frequency from the initial pulse and I am un...
circa 2 anni fa | 1 risposta | 1
1
rispostaDomanda
Create Header with write matrix function
I have exported some data into a CSV file in from Matlab (144 x 4 matrix) At the top of each column I would like to add a titl...
circa 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Grain Model how to remove smaller grains
I have a grain model which consists of lots of tiny grains and clusters of of larger grains. I am wondering how it is possible t...
circa 2 anni fa | 3 risposte | 0
3
risposteDomanda
Fitting line to a curve
I have a plot of attenuation V frequency and I am wondering if there is a way I can fit a straight line the follows the upper tr...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Attenuation as a Function of Frequency
I am wondering if anyone has any experience moddelling how attenuation of a material. I have made an attempt but my attenuation ...
oltre 2 anni fa | 2 risposte | 0
2
risposteDomanda
Pre Selecting Figures to plot
When I run my script I have 10+ figures plotting. Rather than commenting them out, I was wondering if there is a way to set up a...
oltre 2 anni fa | 2 risposte | 0
2
risposteDomanda
Zero Pad My FFT Signal and Window
Hi Everyone I want to know how I can zero pad my FFT signal to make it longer so that I can get better frequency resolution. In...
oltre 2 anni fa | 2 risposte | 1
2
risposteDomanda
Hanning window on Imported data
Hi everyone I am trying to add a hanning window to my time signal before I FFT it. I am not sure exactly what do. Looking at...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
FFT when rescaling data
Hi everyone I have been trying to use an FFT on my imported data. My Time step from my data wasn't equidistant so I tried to ...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Frequency plot not working properly when using IFFT
I have impoted an ultrasound signal to matlab and I was to look at this signal in the frequency spectrum, but I am not sure if ...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Normalising and rescaling my ultrasonic signal
I am exciting ultrasound in wateter which then gooes through the material. I want to notrmalise my signal in such a way that it ...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Legend isn't including all entries
Hi everyone I am getting another error when creating my legend as one of my entries aren't showing figure(03) plot(Time...
oltre 2 anni fa | 1 risposta | 0
1
rispostaDomanda
Error when creating legend
Hi everyone I am trying to print my legend on one of my figures as follows legend('Signal', sprintf('Amplitude = %0.04d', 9....
oltre 2 anni fa | 3 risposte | 0
3
risposteDomanda
changing values in an array
I have a 1000x1 array that ranges from 1 to 179. Any values above 90 in this array I need to do 180 minus any of those values ...
quasi 3 anni fa | 1 risposta | 0
1
rispostaDomanda
Magnitude of a matrix
I have a 1000 x 3 matrix where each column is associated the the x,y and z-direction. For each row I want to find the magnitud...
quasi 3 anni fa | 1 risposta | 0
1
rispostaDomanda
Error in Matlab code
I have attached a picture of my code with error message. It was working yesterday and now it is giving me an error and I don't ...
oltre 3 anni fa | 1 risposta | 0
1
rispostaDomanda
How to get matlab to read the code
I have converted data from OnScale to matlab. I have been given a script which will read the data from this subfolder. The data ...
oltre 3 anni fa | 1 risposta | 0