Community Profile

# qaez

31 total contributions since 2016

View details...

Contributions in
View by

Solved

Make 3d matrix from other matrix
A=[1 1;2 2]; B=[2 2;3 3]; C=[0 0;1 3]; Using given three matrix, make 3 dimensional matrix [D] by stacking.

mehr als 4 Jahre ago

Solved

Removing vibration!
There are [y] that vary with [x] but y including small useless vibration. x=1:10 y=[1.71 2.03 3.28 4.05 5.10 6.82 7.69 8.3...

mehr als 4 Jahre ago

Solved

Make random permutation
Make random permutation that consist of random number from 1 to n.

mehr als 4 Jahre ago

Solved

Calculate z=x^2+y^2
There are z in (x,y). x=1:10;y=1:10 [x y]=meshgrid(x,y) Calculate x^2+y^2.

mehr als 4 Jahre ago

Solved

Calculate cross product
Make function for cross product a=[1 3 2]; b=[2 4 1]; y=function(a,b) y=[-5 3 -2]

mehr als 4 Jahre ago

Solved

Solve the system of linear equations
4x - 2y +6z=8 2x + 8y +2z=4 6x + 10y +3z=0 Find x,y,z. Output should be a=[x;y;z].

mehr als 4 Jahre ago

Solved

Extract a part of matrix!
There is matrix A A=[1 2 3; 4 5 6; 7 8 9] Extract a part of matrix A from (2,2) to (3,3). Result should...

mehr als 4 Jahre ago

Solved

Calculate polynomial equation
Calculate this equation using given x 1+x+x^2+x^3+....x^99 (hint: use polyval)

mehr als 4 Jahre ago

Solved

Delete useless part of data
When someone deals with big data. if the person delete useless part, calculation will be more faster than before deleting. De...

mehr als 4 Jahre ago

Solved

Sort matrix a according to ascending order of B!
To be specific, A=[9 3 1 3] B=[1 3 2 4] are provided, ascending sorting of B is [B(1) B(3) B(2) B(4)]. Thus ...

mehr als 4 Jahre ago

Solved

Calculate circle's property
[A R]=function(r) r is radius, A is area of circles, R is circumference.

mehr als 4 Jahre ago

Solved

Check given number is odd or even
Using input [x], check given number is odd or even if x is odd, output should be true.

mehr als 4 Jahre ago

Solved

Extract area
There are observed data c and its location (x,y) x=1:0.1:10 y=1:0.1:10 [x,y]=meshgrid(x,y) c=x.^2+y.^2 Extract data c i...

mehr als 4 Jahre ago

Solved

Calculate area of sector
A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area.

mehr als 4 Jahre ago

Solved

Calculate RMSE
RMSE(Root Mean Square Error) is widely used to calculate error. Calculate RMSE between [a] and [b] a=[1 2 3 4] b=[0 1 2 ...

mehr als 4 Jahre ago

Solved

Analyze observation data
There are results of observation. A B C -------------------------- t=1 2.2 2.6 2.4 t=2 2.4 ...

mehr als 4 Jahre ago

Solved

Calculate inverse matrix in m by n matrix
x=(1:10)' y=roundn(2*x+7*rand(size(x)),-1) a*x=y Estimate a using inverse matrix calculation. This is principle of li...

mehr als 4 Jahre ago

Solved

Calculate inverse matrix in square matrix
A=eye(3) Calculate inverse matrix of given input. B=function(A) ans = 1 0 0 0 1 0 ...

mehr als 4 Jahre ago

Solved

Interpolate scattered data.
Most data was scattered, and there is no gird. There are three data [c] in three different area [x,y]. x=[1 3 4]; y=[1 ...

mehr als 4 Jahre ago

Solved

Create given matrix
y = 0 0 1 1 0 0 0 0 1 1 0 0 1 1 1 1 1 1 ...

mehr als 4 Jahre ago

Solved

Calculate numerical integration.
x=0:0.01:1 y=x.^2 Calculate area from x=0 to x=1, and y=0 to y=x^2 using numerical integration. (hint: trapz)

mehr als 4 Jahre ago

Solved

Calculate correlation.
There are two data. y1=[0 1 2 3 4]' y2=[2 3 4 5 6]' We can see positive relationship between y1 and y2. The relations...

mehr als 4 Jahre ago

Solved

Make sorting matrix without sort function.
It is very valuable for student to simple sorting program because they learn about use of loop and if-statement. Sort given inpu...

mehr als 4 Jahre ago

Solved

Calculate representive values (max. min. std)
A B C -------------------------- t=1 2.2 2.6 2.4 t=2 2.4 2.8 2.2 t=3 2.6 2.7 2....

mehr als 4 Jahre ago

Solved

Change matrix to vector2
From x = 4 3 5 1 5 1 To y = 4 3 5 1 ...

mehr als 4 Jahre ago

Solved

How to calculate log?
There is a log that have base 5. How to calculate? log5(x)?

mehr als 4 Jahre ago

Solved

Two dimensional moving average
A=[1 2 3 4 5 1 2 2 2 3 2 3 3 3 4 1 1 4 4 2] B=[1 1;1 1]; % This is can be used for weight factor of moving a...

mehr als 4 Jahre ago

Solved

Make roundn function
Make roundn function. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) y=0.56 ...

mehr als 4 Jahre ago

Solved

Change matrix to vector
Vector is a matrix whose size is 1 x n or n x 1. Change matrix to vector. x = 4 3 5 1 ...

mehr als 4 Jahre ago

Solved

Calculate some equation
Using given inputs x and z, make two outputs that are y1 = (xz)/(x/z)^2 + 14x^2 - 0.8z^2 y2 = x^z - z^x + (x/z)^2 - (z/x...

mehr als 4 Jahre ago