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Undefined variable when performing nonlinear curve fitting
I have the following code: clc,clear all,close all filename='d5D21Re50.csv'; M=csvread(filename,1,0); d=5e-3; % particle...
fast 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Phase unwrapping in 2D
I need to perform phase unwrapping in 2D using MATLAB, but the unwrap function seems to work only in 1D. I want to have a routi...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Fitting data to Gaussian function forced to have zero mean
I am trying to fit experimental data to a Gaussian function forced to have zero mean. I tried to use the explicit expression fo...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Fitting the numerical solution of a PDE with one parameter to some data
I need to fit the numerical solution of a PDE with one parameter to some data in MATLAB. I already solved the PDE (by giving ...
mehr als 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Line orientation in 3D from centroid and Euler angles
I used the |regionprops3| function to detect centroid and Euler angles of cylinders of the same size in 3D space. Now I want to...
mehr als 7 Jahre vor | 1 Antwort | 1
1
AntwortFrage
Detecting centroid and orientation of capsules
I have a stack of 128 binary images like this one: <</matlabcentral/answers/uploaded_files/119404/cropped.png>> I want to ...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
From k-space to phase plot
I have an MRI image (a 2D matrix) which has values expressed as complex numbers in k-space. From this image in k-space I want t...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
From 2D data to a 3D matrix
I have a folder with 2D data stored in 128 files (from number 001 to number 128), whose name has this general form: 7528_00...
mehr als 7 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
Detecting capsules from a 3-D stack of MRI images
I have a 3-D stack of MRI images and I want to detect the position (centroid and bounding box) of capsules arranged randomly in ...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Nonlinear fitting of a numerical solution of a PDE
I need to perform nonlinear fitting of a numerical solution of a PDE to experimental data, but I can't use the |nlinfit| functio...
etwa 8 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Average value of an annulus in a square matrix
I have a square matrix of values and I need to evaluate the average value of an annulus between coordinates r and r+dr and repea...
mehr als 9 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Radius and coordinates of the center for a big circle in a bidimensional image
I have a bidimensional (N x N) matrix of pixels like the one shown in the attached figure. Black areas contain zero values, whi...
mehr als 9 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Numerical integral at irregular intervals of scattered data
I have two vectors x,y of equal size (for example 5000 elements), ranging from 0 to 1 (containing scattered data, but already so...
fast 10 Jahre vor | 1 Antwort | 0
1
AntwortFrage
PDF (Probability Density Function) of a 2D matrix of values
I have a 2D matrix of values in .csv text file format (see the file attached) and I want to make a plot of the PDF (Probability ...
fast 10 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Integral average of y values with respect to x values
I have two vectors (x and y) of the same size with x having more than one value in the y direction. For example, x is [0.02 0.0...
etwa 10 Jahre vor | 2 Antworten | 0
