finding a maximum value in a column of a 2 dimensional matrix

I am new to MATLAB and I need to print a maximum value for the second column of my 2-D matrix.

maximum = max(max(variable));

Is this all I need to find that value for the variable or am I missing something more than likely

Answer 1

[Dyuman Joshi]

No, that finds the maximum of all values of the 2D matrix.

Use indexing to provide the 2nd column of the matrix to max() -

y = magic(3)

y = 3×3

8 1 6 3 5 7 4 9 2

m = max(y(:,2))

m = 9

[Austin]

maximum = max(max(thrust));

fprintf('\nMaximum Thrust = %5.1f pounds at %5.1f seconds', maximum,time)

Column 1 of the 2d matrix is the time and column 2 is the thrust. Trying to print the correct time for the max column 2 value

[Austin]

Realized I asked the question incorrectly

[Voss]

format long g
thrust = [0.1 500; 0.5 1000; 0.9 800] % col1: time; col2: thrust

thrust = 3×2

1.0e+00 * 0.1 500 0.5 1000 0.9 800

[max_thrust,row] = max(thrust(:,2))

max_thrust = 
        1000

row = 
     2

max_time = thrust(row,1)

max_time = 
                       0.5

fprintf('\nMaximum Thrust       = %5.1f pounds at %5.1f seconds', max_thrust, max_time)

Maximum Thrust       = 1000.0 pounds at   0.5 seconds

[madhan ravi]

 [max_time, max_thrust] = max(thrust)

[Voss]

format long g
thrust = [0.1 500; 0.5 1000; 0.9 800] % col1: time; col2: thrust

thrust = 3×2

1.0e+00 * 0.1 500 0.5 1000 0.9 800

 % [max_time, max_thrust] = max(thrust)
 [max_time, max_thrust] = max(thrust,[],1)

max_time = 1×2

1.0e+00 * 0.9 1000

max_thrust = 1×2

3 2

max_time = thrust(max_thrust(2),1)

max_time = 
                       0.5

max_thrust = thrust(max_thrust(2),2)

max_thrust = 
        1000

[Dyuman Joshi]

Thank you @Voss and @madhan ravi for responding.