maximum number and indexing

how can i find maximun number from an array for example .a=[2,44,6,77,3,9],how can i find max 2 numbers which are ,44 and 77 from a single command ? and how to know there index .thanks

Answer 1

[madhan ravi]

maxk(a,2)

[asad jaffar]

the version i am using maxk does not work on it ,and i also dont want to creat a function as i want to use it inside a function ,is there any other way i can find max

[madhan ravi]

[Values,Indices] = sort(a,'descend')
[Values(1:2);Indices(1:2)]

[asad jaffar]

thanks , i also want to know that how can i know the index in a vector

[1 2 3 4 5 4 3 2 1]

sum=4 5 4 =13

index =4

sum=9

index=4

sum=5

index=5

its about sum by movsum(a,n) n=3

a=above vactor

[madhan ravi]

I have answered the question you originally asked.

[asad jaffar]

yeah i know ,i already did that but i am having problem in finding the index

function [a,k]=nba_aj(b,n)  ( %b=[1 2 3 4 5 4 3 2 1] n=3,k=index whch should b 4 )
s=length(b);
i=0;
if n>s
    a=0
    k=-1
elseif n<=s
   q=movsum(b,n)
    b=max(q)
% here i want to know the index 
    

[Walter Roberson]

You should create a different Question for this.

Or, better yet, you should look at https://www.mathworks.com/matlabcentral/answers/444784-write-a-function-called-max_sum-that-takes-v-a-row-vector-of-numbers-and-n-a-positive-integer-as

[Jan]

@asad: If madhan's answer solves your problem, be so kind to accept it.