# OldCar

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least square root fit with piecewise function

I would like to perform a fit with a piecewise function, but the curve fitting app doesn't allow that. I have 102 points (see t...

4 years ago | 0 answers | 0

### 0

answersQuestion

continue, how to skip part of a cycle

I have this code, that is supposed to skip to the following k value when count reaches 3 clear clc p=0; for k...

5 years ago | 1 answer | 0

### 1

answerQuestion

function minimization with different parameters

I have a function defined by intervals, it is k/x for |x|>c and -|x|+q with x independent variable. I want to minimize the diff...

5 years ago | 1 answer | 0

### 1

answerQuestion

Function problem with integral

I have written a function that doesn' work. When I type d=apertura(500,10,25); it says Attempted to access apertura(500,10,25...

6 years ago | 1 answer | 0

### 1

answerQuestion

NDFT non uniform discrete fourier transform

Is there any function or toolbox for non-uniform discrete fourier transform? https://en.wikipedia.org/wiki/Non-uniform_discrete...

6 years ago | 1 answer | 0

### 1

answerQuestion

3 D data rapresentation

I have a matrix of values (large part are zero), and two vectors of coordinates, x and y, that defines the matrix in which I hav...

6 years ago | 0 answers | 0

### 0

answersQuestion

I need to scan a text with variable number of coloumns

Hello, I need to scan a text with a variable number of cloumns. I have a counter, nTarget and I know that the coloumns are 3xnT...

6 years ago | 0 answers | 0

### 0

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imregionalmax to find peaks in 3d. I get an error Index exceeds matrix dimensions.

As said in the title I have got an error using imregionalmax. I have two monotone variable xVec, yVec and a third dependent vari...

6 years ago | 1 answer | 0

### 1

answerQuestion

I want to read a badly formatted file

I have a file various formatted (3 text lines, a table, 1 text line, a table) and I would like to read it. I succeded in readi...

6 years ago | 1 answer | 0

### 1

answerQuestion

How to find peaks in 3d mesh?

Hi, I have a mesh made from data ([Y,X] matrix and Z values) and I would like to find the peaks and report their position. How c...

6 years ago | 3 answers | 0

### 3

answersQuestion

Write an image with file name specified in a variable var1 (char)

I need to write an image and I want to give it a name that is stored in a variable var1, which is a 4 byte char. I am trying to...

6 years ago | 2 answers | 0

### 2

answersQuestion

Mesh without plot zeros

I have a matrix, say 123X531 and I have most of rows equal to zero (only 49,50,51,52 and 53 are non zeros). The elements are all...

6 years ago | 0 answers | 0

### 0

answersQuestion

IDL readu equivalent in matlab

Hello, I have a .pro script (IDL) and I want to implement in Matlab. I don't know the equivalent of READU (read unformatted file...

6 years ago | 1 answer | 0

### 1

answerQuestion

Problem with fzero function

I had some troubles in using fzero. Here is my script: lambda=0.23; T_orb=86400; D=130*1000; omega=2*pi/T_orb; distance=...

6 years ago | 1 answer | 0

### 1

answerQuestion

Why acos fails?

I have a Space Mechanics problem: I have a position vector and a velocity vector of a circular orbit with i=0. I have a problem ...

6 years ago | 1 answer | 0

### 1

answerQuestion

Need a compiler for use mex

I need to install a compiler tu use mex, but when I try to instal SDK 7.1 it says that I haven't .Net framework 4.0 but when I ...

6 years ago | 1 answer | 0