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**Content Feed**

Question

Plotting ROC curve

Hai friends, MATLAB provides a function 'plotroc' for plotting ROC curve. How many features (attributes) i can pass to this fun...

10 years ago | 0 answers | 0

### 0

answersQuestion

Gabor filter.

Hai friends, I am trying to implement Gabor filter.What are Lambda,theta,psi,sigma,gamma here ? How can i extract them from ...

10 years ago | 1 answer | 0

### 1

answerQuestion

Data pre-processing.

Hai all, I have a set of data taken by extracting texture features. I have to use it for classification. Each feature has 4 cla...

10 years ago | 0 answers | 0

### 0

answersQuestion

Classification data pre-processing

Hai, I have a data set having two features. Each feature has 62 elements. These 62 elements are divided into 4 classes. But int...

10 years ago | 0 answers | 0

### 0

answerssvm classification

search for 'svmclassify' on MATLAB help. But the example code given there can be used only for 2-class classification .

10 years ago | 0

Question

Classifiers. How can i draw 3-D plot ?

Hai friends, I am trying to use SVM and Naive Bayes classifiers given in MATLAB for 3-class classification. Can they be used us...

10 years ago | 2 answers | 0

### 2

answersQuestion

Support Vector Machine. The example is wrong in MATLAB 2010a help.

The support vector machine code given in MATLAB help is wrong. It can not simply work. How many of you agree ?

10 years ago | 0 answers | 0

### 0

answershow to calculate the processing time for the simulation

yes. You can tic and toc functions for that. for example, tic %event starts here . . some instructions . . . toc % ...

10 years ago | 1

Question

Support Vector Machine. Help please.

*Hai...I wanted to use SVM classifier code given in MATLAB. The problem is that the classifier is not giving correct classificat...

10 years ago | 0 answers | 0

### 0

answersQuestion

Problem in understanding Bayes Classifier.

Hai friends, i have a code foe Bayes classifier. Even though everything is explained regarding how to give input, i am totally...

10 years ago | 0 answers | 0

### 0

answersUsing for loop

hai. you try saving the value of class in an array, so that each time loop runs it will be automatically saved in that.

10 years ago | 0

Question

Chart in MATLAB

How to draw chart in MATLAB? i have two variables x and y. I want them to draw in a chart.

10 years ago | 1 answer | 0

### 1

answerQuestion

KNN classification

Hai.. I am using KNN classification algorithm. Which distance measure is used by default when i use the function 'knnsearch' ...

10 years ago | 1 answer | 0

### 1

answerQuestion

k-NN search. What is the difference between these 2-codes ?

{ The program for k-NN search in MATLAB. load fisheriris %inbuilt data set provided in MATLAB. x = meas(:,3:4); gscatt...

10 years ago | 1 answer | 0

### 1

answersuppressing the display of ans

It is not possible. Where there are no arguments MATLAB automatically makes "ans" a variable and assigns value to it. You cant h...

10 years ago | 1

find Centre of ball/3D model of picture

k. first crop out the unwanted portion of the image - that is background. Now only the ball remains in the image. now consider ...

10 years ago | 0

Question

Plot using scatter3 function.

Hai friends, I have to plot a graph using scatter3 function. i have 3 variables x,y and z with 24 elements in each. I want 3 v...

10 years ago | 3 answers | 0

### 3

answersQuestion

Principle Component Analysis

Friends, I understood explanation given on PCA in help. But i am not able to understand how to select the best features/varia...

10 years ago | 1 answer | 0

### 1

answerQuestion

return index of biggest element in a row-matrix.

Friends, I have a row matrix. i have to return the index of the biggest element in the row. how can i do this ? thankq...

10 years ago | 1 answer | 0

### 1

answerQuestion

Return coordinate of first nonzero element.

Hai friends, I have a binary image. I want my function return coordinate of the first nonzero value pixel from a selected row. h...

10 years ago | 1 answer | 0

### 1

answerQuestion

Return coordinate of a first nonzero value pixel from a matrix of an image.

Hai friends, I have a binary image. I want my function return coordinate of the first nonzero value pixel from a selected row....

10 years ago | 1 answer | 0

### 1

answerQuestion

Crop out unwanted part from an image.

Dear friends, I want to crop out extra part of CT Head image. I mean i want my image should have only required part of the imag...

10 years ago | 2 answers | 0

### 2

answersQuestion

How to recostruct ROI on an image and diaplay it?

dear friends, I hav got a set of co ordinates of an ROI. Now i want to reconstruct the ROI on an image and display it. How can ...

10 years ago | 4 answers | 0

### 4

answersHelp me, please. I want a matrix transform averaged and unique in specific col,

may u please elaborate your question? im not getting ur problem...

10 years ago | 0

Question

How to save an image displayed ?

Dear friends, i would like to save an image displayed by imshow(I) command in tif format. for example, ifter displaying the ima...

10 years ago | 3 answers | 0

### 3

answersHow do I use IMFILTER to high pass filter an image?

Simple averaging your image can fulfill your need if u are not particular with the pass band.

10 years ago | 0

error using imsubtract

convert them to the same class. both the images shud be in the same format.

10 years ago | 0

Threshold

I dont think u need that much big program. the program below exemplifies ur need. But i this case the pixels below 70 and above...

10 years ago | 0

Subplotting images with different scale

I don think your need has any particular application.

10 years ago | 0

Question

How to append data in excel file ? why my program given below is not working ?

Hi friends, I want to append the data generated by some calculations to the existing excel file. In the program given below, i'...

10 years ago | 1 answer | 0