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William Rose


Con actividad desde 2007

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Respondida
Fill area between two lines
@Amélia, Since we do not have your data (xxO, envelopeminO, envelopesupO), I have made up some values to use for the example be...

14 días hace | 0

Respondida
Convert pixel/grayscale values ​​to decibels
@ESTER LIMA, given two levels, PVmin and PVmax, whose values are proportional to the intensity of the ultrasound signal, the dec...

17 días hace | 0

Respondida
Enhancing Embolic Signal Visualization in Transcranial Doppler Graphs
@Patrícia, Please upload data files that go with the two screenshot images which show possible emboli. Adjust the color scale...

17 días hace | 1

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Respondida
I need to call up a vertex from polyshape command
@Bruce Griffin If you have a polygon pgon, of unknown size, get the number of vertices: pgon=polyshape(cosd(0:40:320),sind(0:4...

18 días hace | 0

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Respondida
HEART RATE from heart sound
@Monday David, If you attach the MP3 file, others can run your code. You will have to zip it first. [Edit: The sounds which ar...

19 días hace | 0

Respondida
How can I Plot eigenvectors of a graph on the graph as bars coming out of vertices?
@Defne Odabasi, You can plot arrows representing a 2D eigenvectors, at specific locations, with quiver(X,Y,U,V), where X and Y ...

19 días hace | 2

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Respondida
Determining the input from the output using IFFT
@Ganesh Prasad, Here is a script that does the deconvolution in the frequency domain, using the ideas in my comment above. It a...

19 días hace | 0

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Respondida
Having trouble with lsqcurvefit for a heat transfer experiment.
@Nate, The plot below shows the measured data (red *), and the predicted temperature profile with h=150, 2000, and -4000. It s...

21 días hace | 0

Respondida
Method used by fitnlm to estimate coefficients
@Alex, By default, fitnlm() minimizes the sum squared error. It uses the Levenberg-Marquardt algorithm to find its way downhil...

21 días hace | 0

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Respondida
implicit numerical method: 1-D unsteady state heat transfer using finite difference method
@Joydeep Bagchi, I think you need to divide the long term (u(i+1,n)-2*u(i,n)+...) by 2, on the right side of your Crank-Nicolso...

24 días hace | 0

Respondida
Interpolating data to get values at specific depth
@Luís Henrique Bordin, x=(0:10); y=(0:11)'; z=[1.0, 2.3, 5.6, 8.3]; % vectors x,y,z [X,Y]=meshgrid(x,y); %Make data() with de...

24 días hace | 1

Respondida
How to find out the amplitude and duration of a sine wave of different amplitudes?
@A Lumbini, If you must use wavelets, do a continuous wavelet transform (cwt). THe Matlab documentation is good. Make a 50 Hz s...

26 días hace | 0

Respondida
How to find out the amplitude and duration of a sine wave of different amplitudes?
@aswathy, @A Lumbini, I would not use wavelets. , I would use stft(). Make a signal which is 3 seconds long. The frequency is ...

27 días hace | 0

Respondida
Which optimization tool should be used for solving my convex optimization problem?
@KAGANA SARATH, I agree with @Torsten: try fmincon. It allows you to specify linear and nonlinear equality constraints and ine...

27 días hace | 0

Respondida
Plot the first-order autocorrelation functions for the following light sources: perfect monochromatic source, a thermal lamp((Lc=1 μm, a led =100 μm), lasersLc=1 m and 1 km
@OMEIR HUSSAIN, [Edit: fix spelling errors.] You can format your code as code, by highlighting your code, then click the "Code...

29 días hace | 0

Respondida
Box plot function help
@Benjamin Wilson, Others cannot run the code you supplied, since we don;t have singlepricingprogrammenew(), and I'm not suggest...

29 días hace | 0

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Sharpe ratio in Report
@jorge cogno, [edit: the 0 in the equation below is for the risk free rate] "RiskFreeRate=0 TotalReturn=0.22943, SharpeRatio=0...

alrededor de 1 mes hace | 0

Respondida
how can I create a simple clutter model?
@Kerem Yüksel, [edit: fix spelling errors] [Edit 2: My initial implementation had an exponential distribution of clutter radi...

alrededor de 1 mes hace | 0

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Respondida
How do I find the most stable N consecutive numbers?
@Ali Almakhmari, How about this: x=rand(1,2500); n=50; stdx=zeros(1,length(x)-n+1); % allocate array for stdev(x(i:i+49)) f...

alrededor de 1 mes hace | 0

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Respondida
Comparing Finite difference method answer with analytical for 2d plate heat transfer
@Christopher, [Edit: add a line of code to display the maximum temperature for each value of N.] Another excellent answer fro...

alrededor de 1 mes hace | 0

Respondida
how to plot eigenvector calculated from eigs from the matrices created by freefem++
@AMIT, quiver() is good for 2-D vectors; quiver3() for 3D. For an example, I will use the magic square matrix, but I could us...

alrededor de 1 mes hace | 0

Respondida
how get the range from FFT on FMCW radar data
@Simeon, You need to specify exactly what the signal that you have consists of. It could be the received signal mixed with a re...

alrededor de 1 mes hace | 0

Respondida
How to plot a linear function?
@Jenni, [edit: Fix typo: change "values at" to "values are"] It looks like you want to plot measured data as well as the best-...

alrededor de 1 mes hace | 0

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Respondida
Why the calculated phase differs so much from the real phase of the signal?
@Janko, The DFT expresses a signal x(k) as a sum of sinusoids, each of which is sampled at regular intervals. The phase angles...

alrededor de 1 mes hace | 2

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Respondida
Create a node in the space between two nodes (A and B) and following the direction normal to a node (N)
@Alberto Acri D=(A+B)/2; % the location E=cross((A-B),(N-D)); % the direction good luck

alrededor de 1 mes hace | 0

Respondida
How to solve this function?
@Ramesh, I am not sure what you mean by "how do you solve this function". You have posted a function. par=struct('A',1,'E',2,...

alrededor de 1 mes hace | 0

Respondida
Solving 2d heat problem using meshgrid
@Ali, [edit: fix spelling erors] A 10x10 mesh for this problem is so few points that it makes it hard to set up the problem an...

alrededor de 1 mes hace | 0

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Respondida
How to reduce \t commands
@TheSaint, Hard to say, since we don't know what F and SC and E are. You use the word table. Have you used Matlab's T=table...

alrededor de 2 meses hace | 0

Respondida
Advice on formulating a minimization function
@Collin Pecora, If you want to use multiple sources of data, with different levels of measurement error, to estimate parameters...

alrededor de 2 meses hace | 0

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Respondida
looped 3D FFT of 4D data
@sbr, P2 is 64x64x64. P1 is 1x33. Your plot shows that one column along one corner-edge of the cube P2 is zero. But P2 is not...

alrededor de 2 meses hace | 0

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