Community Profile # eri

### ITS

Active since 2011

#### Statistics

• #### Content Feed

View by

Question

how to reverse matrix?
i want to reverse the order of row or column, example if i have matrix 2 4 7 7 8 5 it will become(column) 7 4 2 ...

9 years ago | 1 answer | 0

### 1

Question

how to make histogram?
i have a data of closing price for various stock, i want to make a histogram from it, and i want the histogram to be drawn as on...

9 years ago | 2 answers | 0

### 2

Question

how to find lambda from this formula?
det (A - lambda * I) = 0 where: A= a square matrix, ex: [2 5 4;8 6 9;3 4 6] I= identity matrix

9 years ago | 1 answer | 0

### 1

Question

how to remove some row or column of a matrix at once?
lets say i have a 100x100 matrix and i want to remove row 71-100 so it become 100x70 matrix

10 years ago | 2 answers | 0

### 2

Question

how to add string matrix to numeric matrix?
example: from a=[rice;corn;wheat] b=[3;4;3] become c=[rice 3;corn 4;wheat 3]

10 years ago | 3 answers | 0

### 3

Question

what is the meaning of this?
Parse error at '=':usage might be invalid MATLAB syntax.

10 years ago | 0 answers | 0

### 0

Question

how to create matrix of string and use it in mathematic operation?
example a=[1;0;1;1;0] b=[ben;james;mike;ralph;will] c=a.*b c=[ben;mike;ralph]

10 years ago | 2 answers | 0

### 2

Question

how to find maximum or minimum element in a matrix?
example a=5 b=8 c=2 d=6 x=[a b c d] how to find minimum or maximum element of matrix x? the answer i want is its variab...

10 years ago | 3 answers | 0

### 3

Question

how to find matrix in a matrix?
i have matrix a and b. matrix b is created from matrix a components(rows in this case). now i want to find out from which row of...

10 years ago | 1 answer | 0

### 1

Question

can someone tell me whats wrong with my coding?
i make this, and it work just fine clear all clc load matrix4; b=a [x,y]=size (b) d=9999999999999999999999...

10 years ago | 1 answer | 0

### 1

Question

matrix, using variables like a1,a2,a3,...an, minimum
how to take matrix element (i.e row) one by one and save each new matrices in a new variable example: original matrix: a=...

10 years ago | 3 answers | 0

### 3

matrix manipulation
can someone help me?

10 years ago | 0

Question

matrix manipulation
how to take matrix element (i.e row) one by one and save each new matrices in a new variable example: original matrix: a=[2...

10 years ago | 3 answers | 0

### 3

Question

invers from covariance of a matrix*matrix'
given a is a matrix, is the matrix of covariance of (a*a') is always singular?

10 years ago | 2 answers | 0

### 2

Question

normal distribution test
i have historic data (daily) of 30 stock from 250 day (i make 30x250 matrix from it), now i want to test whether this data is no...

10 years ago | 5 answers | 1

### 5

Question

matrix manipulation
how to remove row(s) or column(s) of a matrix and save the new matrix with different name? and is there any limit on how big of...

11 years ago | 1 answer | 0

### 1

Question

how to count row and column of a matrix
if i have a big matrix and i don't know its size, how to find out its size? and how to save it as variable?

11 years ago | 3 answers | 0