octave

Using Matlab I can see the 4th channel of my image, but not with Octave: the following Matlab code for image (I) gives I =imread('../rec3/2012R_1_1.tif') [nr nc nb] = size(I); nb It gives out : nb = 4 where nb is the channel number and I is a 64 bit image(3057x1210) But for the same image Octave gives : nb = 3 Should I load any special package in order to be able to work with hyperspectral images? EDIT The output of the imfinfo for Octave: ans = scalar structure containing the fields: Filename = c:/2012R_1_1.tif FileModDate = 10-May-2016 20:02:10 FileSize = 23140500 Format = TIFF FormatVersion

I have about 100,000 numbers that I would like to group together based on dividing by two or increments of two. PS: The increment values may change and the values found in the main array "x" can only be used once. I'm not sure how to check and stop the loop if a number in the "array_all" array has been repeated from the "x" array. See example below Example: x=[9,8,7,6,5,4,3,2,1] I'm trying to get the array_all array to look like this: array_all= [ 9.00000 4.50000 2.25000 8.00000 4.00000 2.00000 7.00000 3.50000 1.75000 6.00000 3.00000 1.50000 5.00000 2.50000 1.25000 1.00000 0.50000 0.25000] and

I am working on a robot and my goal is to plot the state of the robot. For now, my workflow is this: Launch the program Redirect the output in a file (robot/bash): rosrun explo explo_node > states.txt Send the file to my local machine (robot/bash): scp states.txt my_desktop:/home/user Plot the states with octave (desktop/octave): plot_data('states.txt') Is there a simple solution to have the data in "real time"? For the octave side. I think that I can with not so much difficulty read from a file as an input and plot the data when data is added. The problem is how do I send the data to a file?

I would like to run some Matlab scripts. Nevertheless we don't have the Matlab licence so it is necessary a conversion from Matlab to R language. Unfortunately I'm totally new in Matlab but not in R. Is it possible to read Matlab scripts using R or is there an easy way to translate Matlab scripts in R? Rewriting from one language to another can be a painstaking process, especially because your have to take great care that the outcomes of both sets of codes are the same. I see roughly four approaches: Digest the goal of the scripts, put aside the matlab code, and rewrite in R Try and mimic the

I want to compute the eigenvalues for a generalized eigenvalue problem with lambda * M * v = K * v, where lambda is the eigenvalue, v is an eigenvector, and M and K are matrices. Let's say we have K = 1.8000 + 0.0000i -1.0970 + 0.9550i -1.0970 - 0.9550i 1.8000 + 0.0000i M = 209 0 0 209 In Octave, if I do [V,D]=eig(K,M) , I get: V = 0.53332 - 0.46429i -0.53332 + 0.46429i 0.70711 + 0.00000i 0.70711 + 0.00000i D = Diagonal Matrix 0.34555 0 0 3.25445 However, if I do scipy.linalg.eig(K, b=M) using Scipy in python, I get a different result: >>> import numpy as np >>> import scipy as sp >>> import

I'm new in using batch scripts, and moderately experienced with octave. I have a lot of data files I examine with octave functions and I am trying to set up so that I can double click on files with a custom extension to directly open octave functions. Think "when I double click on this text file, it opens in notepad." To do this I've written a very basic .bat file and I've associated my .data files to open using this .bat file. The .bat file looks like this: C:\Octave\Octave-4.2.1\octave.vbs --no-gui --persist --eval myOctaveFunction.m pause I've tested it with a hard coded filename inside