How to plot a graph in matalab2016?

When I use plot() it gives an error that the value is not integer.

I want to plot the graph

E=[0.0236;0.0485;0.0889;0.569;0.789;0.894;1]

and

   top=[10%;15%;20%;30%;40%;50%]

Please help.

[KSSV]

Show us the complete code...which you tried...

[SUNANNA S S]

Actually I'm trying to implement the PageRank algorithm in my code . But this gives an error. Please help. I want to plot the graph of Eap on y axis and top on x axis.

 clc;
% n = 6;
% i = [2 6 3 4 4 5 6 1 1];
% j = [1 1 2 2 3 3 3 4 6];
load Eapfinal.mat;
top=[0.10,0.15,0.20,0.30,0.40,0.50];
s=top;
t=Eap;%Eap=0.0136,0.0503,0.1761,0.2724,0.2985,0.2986
n=6;
G = sparse(s,t,1,n,n);
spy(G)
%%Page Rank
p = 0.85;
delta = (1-p)/n;
c = sum(G,1);
k = find(c~=0);
D = sparse(k,k,1./c(k),n,n);
e = ones(n,1);
I = speye(n,n);
x = (I - p*G*D)\e;
x = x/sum(x);
%%Bar graph
bar(x);
title('Page Rank');

The error I get after running this code is

 Error using sparse
Index into matrix must be an integer.

 Error in PageRankafter (line 13)
G = sparse(s,t,1,n,n);

Answer 1

[Rik]

In general you should copy the entire error stack (all the red text). This makes it easier for others to understand what went wrong.

I noticed 2 things:

• the percent sign marks the beginning of a comment, so top will not be correctly assigned (although I assume that you already did top=[0.10,0.15,0.20,0.30,0.40,0.50];)
• E has 7 values, while top has only 6. It is impossible for plot to know what xy-pairs to make.

Answer 2

[Walter Roberson]

The call

G = sparse(s,t,1,n,n);

means that you want to create the sparse matrix equivalent of

G = zeros(n, n);
for K = 1 : length(s)
  G( s(K), t(K) ) = 1;
end

That can only work if all of the elements of s and all of the elements of t are positive integers, but they are not: they are values like 0.10 and 0.0136

It is difficult to say exactly what your replacement code should be. Possibly

Gs = sparse(i, j, s, n, n);
Gt = sparse(i, j, t, n, n);

if the intention is to create sparse matrix that has the values in s stored at the i and j locations, an that has t stored at the i and j locations. Sparse matrices cannot be multi-dimensional: you can only store a single value at any one index pair.