How to find maxima and minima of a column matrix without using findpeaks ?

I dont have signal processing toolbox in my matlab package so I cant use findpekas.

Answer 1

[Matt J]

d=conv( [A(1); A(:); A(end)],  [1 ;-2 ;1],  'valid');
saddles=find(d==0)
maxs=find(d>0)
mins=find(d<0)

[Vishnu Dhakad]

this is not worked

for better understanding, I have attached the file.

[Matt J]

I've fixed it.

[Catalytic]

This worked great for me. +1

[Vishnu Dhakad]

Thanks its working

I want location also.

[Matt J]

The code I gave you does give the location.