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myung hyun Kim


44 2016 年以降の合計貢献数

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解決済み


Extrack values in 2-dimensional data
There are data c at (x,y) x=1:10;y=1:10; [x,y]=meshgrid(x,y) c=exp(sqrt(x.^2+y.^2)) Estinate data c at (x=5.4,y=7....

4年弱 前

解決済み


Calculate gradient
x=1:0.1:5; y=x.^2; calculate gradient (dy/dx) using numerical method. This means dydx(i)=(y(i+1)-y(i))/(x(i+1)-x(i)...

4年弱 前

解決済み


Interpolate data!
There are two data that observed at two different location. x indicate position, d indicate value of data. x=[1 10] d=[2 ...

4年弱 前

解決済み


Make equation that can express relationship!
Observed data [y] that vary with [x]. Unfortunately, [y] including small amount of errors. x=[1 2 3 4 5 6] y=[2.16 4.97 ...

4年弱 前

解決済み


Determine point is located in a circle or not
Using input [x] and [y], determine the points (x,y) is located inside of circle (x^2+y^2=1) if point is located in circle,...

4年弱 前

解決済み


How to permute given 3d matrix?
A(:,:,1)=[1 3] A(:,:,2)=[2 2] A(:,:,3)=[4 3] Change rows to columns and columns to rows, similar to transpose. Resul...

4年弱 前

解決済み


Change coordinate from Cartesian to spherical coordinates.
[x,y,z] -> [t,p,r] [x,y,z] is a point in the Cartesian coordinates. change its coordinate to spherical (t,p,r), t is azimuth,...

4年弱 前

解決済み


Calculate temperature of object
An object that have initial temperature T0 is in a room that has temperature Ts. The object's temperature in time t is T=Ts+(...

4年弱 前

解決済み


Calculate geostrophic current
eta0=0.01; R=300; f=0.01; g=9.81; x=-500:50:500; y=-500:50:500; [x y]=meshgrid(x,y); eta=eta0*exp(-(x.^2+...

4年弱 前

解決済み


Resort number using given index!
Resort matrix [a] using given index [b]. For example, if a=[2 5 3 5]; b=[4 1 2 3]; , the result is [5 2 5 3]. (hint: y...

4年弱 前

解決済み


Calculate this one!
Using matlab calculate y y=(e^2)+100/20+sin(pi)

4年弱 前

解決済み


Find peaks
x=0:0.1:10 y=exp(-0.7*(x-2).^2)+0.5*exp(-0.7*(x-7).^2) There are two peaks.(try plot(x,y)) Make code for finding peaks'...

4年弱 前

解決済み


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

4年弱 前

解決済み


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...

4年弱 前

解決済み


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

4年弱 前

解決済み


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.

4年弱 前

解決済み


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

4年弱 前

解決済み


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...

4年弱 前

解決済み


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 ...

4年弱 前

解決済み


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

4年弱 前

解決済み


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.

4年弱 前

解決済み


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

4年弱 前

解決済み


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.

4年弱 前

解決済み


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...

4年弱 前

解決済み


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 ...

4年弱 前

解決済み


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...

4年弱 前

解決済み


How to check matrix's size?
x=randi(100) y=randi(100) A=zeros(x,y) Can you measure size of matrix A?

4年弱 前

解決済み


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

4年弱 前

解決済み


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 ...

4年弱 前

解決済み


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)

4年弱 前

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