craigacp / feast Goto Github PK

Hello!

I'm testing the latest feast toolbox with this simple code:

y=[zeros(5,1);ones(5,1)];

X=ones(1,10); %Constant
X=[X' rand(10,1)]; %Random
X=[X y]; %Just a copy of target Y

[sel,score]=feast('jmi',3,X,y)
sel =
3
1
2

score =
1
1
1

And the score of all the variables are the same. Is that the desired result? I'm expecting different scores.

Hi,

Am using Matlab and am facing an "Undefined function or variable 'FSToolbox'." error when I run 'testFSToolbox.m' file.
Any advice please ?

Thank you

Hey,

I am looking for the following paper you mentioned:

 Information Theoretic Feature Selection for Cost-Sensitive Problems
 A. Pocock, N. Edakunni, M.-J. Zhao, M. Lujan, G. Brown.
 ArXiv

I didn't find it on ArXiv. Can you provide me a link?

Best,

Andreas

Hi, I tried to use the Matlab toolbox, but I got crash with the mex file.
I attached the log file created by matlab. Thank you.

      Access violation detected at Sun Aug 07 20:39:05 2016

Configuration:
Crash Decoding : Disabled
Crash Mode : continue (default)
Current Graphics Driver: Unknown hardware
Default Encoding : windows-1252
Graphics card 1 : NVIDIA ( 0x10de ) NVIDIA GeForce GTX 560 Ti Version 9.18.13.4788
Graphics card 2 : NVIDIA ( 0x10de ) NVIDIA Tesla M2090 Version 10.18.13.6256
Host Name : ChuongWin8
MATLAB Architecture : win64
MATLAB Root : C:\Program Files\MATLAB\R2016a
MATLAB Version : 9.0.0.341360 (R2016a)
OpenGL : hardware
Operating System : Microsoft Windows 8.1 Pro
Processor ID : x86 Family 6 Model 45 Stepping 6, GenuineIntel
Virtual Machine : Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
Window System : Version 6.3 (Build 9600)

Fault Count: 1

Abnormal termination:
Access violation

can you help to find something similar in python

MIM,o is missing from the all target in the Makefile

@alecuba16 and @mbq have worked on different R interfaces for FEAST (see #3). This issue is to discuss merging in any changes to the core C library or build system to improve usability for R and other possible ports.

Hello!

As I told you on mloss, I would like to modify the CMIM to accept a set of predefined features by a input , so as a first approach I will work on this code from CMIM.c:

I think that the first loop on lines 80-94 is mandatory because you have to calculate first the max CMIM of whole the features (including pre-selected), is right?

Imagine that I have already received preSelectedFeatures as an array of the positions of the features presents on feature2D and a auxiliary function isApreSelectedFeature as a simply search and check if exists.

CMIM.c lines 104 ->129

for (i = 1; i < k; i++)
{
score = 0.0;
iMinus = i-1;
for (j = 0; j < noOfFeatures; j++)
{
while ((classMI[j] > score) && (lastUsedFeature[j] < i))
{
----------- my code ----------------------------------
if( isApreSelectedFeature(j,preSelectedFeatures)){
outputFeatures[i] = j;
}else{
---------- finish my code ----------------------------
/double calculateConditionalMutualInformation(double *firstVector, double *targetVector, double *conditionVector, int vectorLength);/
currentFeature = (int) outputFeatures[lastUsedFeature[j]];
conditionalInfo = calculateConditionalMutualInformation(feature2D[j],classColumn,feature2D[currentFeature],noOfSamples);
if (classMI[j] > conditionalInfo)
{
classMI[j] = conditionalInfo;
}/reset classMI/
}
/moved due to C indexing from 0 rather than 1/
lastUsedFeature[j] += 1;
}/while partial score greater than score & not reached last feature/
if (classMI[j] > score)
{
score = classMI[j];
outputFeatures[i] = j;
}/if partial score still greater than score/
}/for number of features/
}/*for the number of feature

What do you think?

Dear Adam

I need to get a score for each fearure as I need to to know the difference between them. For example, how much important is feature 1 than feature 2?

Can please provide the code for that?

Thanks

Elina

I compiled this code to use with PyFeast. I ran make x64 and sudo make install. When I tried to run the code that uses FEAST through PyFeast I got a segmentation fault. I determined the segmentation fault was due to the FEAST code.

I didn't find instructions on proper installation with the make file, could the segmentation fault be due to incorrect installation, or are there any suggestions for another reason I got a segmentation fault?