Ploting stack of matrices

Hi,

I have stack of 100 A= 4*4 matrices ,and a vector of B= 1*100 elements. I want to plot (B,A) . What are possible solutions for this ? Do I have to make a function that will respond to one matrix ata time for certain element ?

Also in matlab if you have 100*4*4 matrix what does it mean?

[Walter Roberson]

How many lines are you expecting? 100? 4? 16?

A 100 x 4 x 4 matrix is a block of memory that is modelled as if it were arranged in a cuboid with 100 rows and 4 columns and 4 layers ("panes"). The block is stored with left most index varying most quickly, so A(100,4,2) is the previous item in memory from A(1,1,3)

[sharay]

I have x= 1*100 matrix and then Y = 4*4 matrix with 100 stacks.

[Walter Roberson]

How many lines do you expect to be drawn as a result?

[sharay]

In total 16 lines.

Answer 1

[KALYAN ACHARJYA]

A=randi(100,[100 4 4]);
%........... ^[rows column number of stack planes]
B=randi(100,[100 4]);
[r c d]=size(A);  % d represents here number of stacks planes
for i=1:d
    plot(A(:,:,i),B);
    hold on;
end

Read about multidimentinal array here

But if I have to generate 100 4*4 matrices what should be the procedure?

Are you looking for 100 stacks for 4x4 matrics, then

A=randi(100,[4 4 100]);
%.......^ represents maximum allowed values in the randomly generated matrics

Non Integer, then

A=rand(4,4,100);

Hope it helps!

[sharay]

Hi,

it is not working if you wabt to plot (X,Y) where X is 1*100 and Y is 4*4 100 matrices

[KALYAN ACHARJYA]

If the X is 1*100 then B must be same as Y must be same size 1*100 with any number of stacks, example

X=randi(100,[1 100]);
%........... ^[rows column number]
Y=randi(100,[1 100 n]); % here n is any number of stacks

[sharay]

no, I think you are not getting. In your code B is 4*4 matrix. but i have 1*100. mean 1 row and 100 columns.

[KALYAN ACHARJYA]

Lets make it simple to undestand the issue

Say X is 1*100 (It's menas it having 100 elements) and Y is 4*4 matrices (Lets say 1 matrices first) having 16 elements, how you going to plot those numbers?

[sharay]

yes, this is the problem. for one element i have 16 elements. so for 100 elements on x-axis , i have to plot 1600 elements .

[KALYAN ACHARJYA]

You can talk with me through my number (please check profile)

Answer 2

[sharay]

Thnak you . I solved this issue. Can someone help me with ploting like now i have 100*1 matrix and I want to plot it with 4*4 matrices of 100 layers. Should i assign function ?

Answer 3

[Walter Roberson]

If you have x being a 100 x 1 matrix, and y being as 100 x 4 x 4 matrix, then

plot(x, reshape(y, size(y,1), []))

This would create 16 lines, in the order y(:,1,1), y(:,2,1), y(:,3,1), y(:,4,1), y(:,1,2), y(:,2,2), y(:,3,2) and so on.

[sharay]

Input is 1x100 and output is 4x4x100.

[Walter Roberson]

Yp =
reshape( permute(y, [3 1 2]), [], 16);
plot(x, Yp) ;