How can I figure out the highest value in my diagram? And mark it?

UPDATE My new Code! Input: "Input1.txt

Input_Matrix = textread('Rainflow_Input1.txt')
[zeilen,spalten]=size(Input_Matrix)
x = Input_Matrix(:,1)
y = Input_Matrix(:,2)
z = Input_Matrix(:,3)
colorbar('location','Manual', 'position', [0.93 0.1 0.02 0.81]);

az = 0;
el = 90;
view(az, el);

%scatter3(x,y,z,'filled')%Problem i dont know to make it filled
view(0,90)% view from above !!!http://de.mathworks.com/help/matlab/ref/view.html
a = 30;%markersize
scatter3(x, y, z, a, z, 'filled');
hold on
view(0, 90)
idx = find(max(z)) ;
hold on
plot3(x(idx),y(idx),z(idx),'*r')
colorbar
datacursormode on

How can I figure out the highest value in my diagram? I want to mark it in my diagram. So the x y and z value should be displayed from the highest value -> z!. Thank you for your help guys. I really appreciate it.

Input_Matrix = textread('Rainflow_Input1.txt')
  [zeilen,spalten]=size(Input_Matrix)
  x = Input_Matrix(:,1)
  y = Input_Matrix(:,2)
  z = Input_Matrix(:,3)
  colorbar('location','Manual', 'position', [0.93 0.1 0.02 0.81]);
  az = 0;
  el = 90;
  view(az, el);
  %scatter3(x,y,z,'filled')%Problem i dont know to make it filled
  view(0,90)% view from above !!!http://de.mathworks.com/help/matlab/ref/view.html
  a = 30;%markersize
  scatter3(x, y, z, a, z, 'filled');
  view(0, 90)
  colorbar;

Answer 1

[KSSV]

idx = find(max(z)) ;  % gives the position of maximum z 
hold on
plot(x(idx),y(idx),'*r) ;   % plots the location

read about find..

[Philipp Mueller]

Hi Dr. Kolukula,

It does not work exactly :/

[KSSV]

N = 20 ;
x = rand(N,1) ;
y = rand(N,1) ;
z = rand(N,1) ;
c = rand(N,1) ;
scatter3(x,y,z,'filled')%

idx = find(max(z)) ;
hold on
plot3(x(idx),y(idx),z(idx),'*r')

[Philipp Mueller]

yes but the wrong point is marked. See the colorbar another point with yellow/orange must be marked -> see my new code. sorry for making you troubles :/ i want to apologize

[Philipp Mueller]

i got it :D thanks anyway