not able to calculate mean within the selected range

Hi i have to calculate min,max and mean of y-axis within a range selected in x-axis.for range min and range max i have created 2 editboxes using guide .and am using one push button,when i push the button it should calculate min,max and mean of selected range and display in other 3 editboxes created for display.here is my code.please help

      x=0:1:200;
data=get(handles.uitable1,'data');％200*4 matrix
one=data(:,2);
x1= get(handles.min,'string') %value entered in editbox of tag min
x2= get(handles.max,'string') %value entered in editbox of tag max
 range =[x1 x2]   
 start_pt = min( find( x >= range(1) ) )
 end_pt = max( find( x <= range(2) ) ) 
 y_in_range = one(start_pt:end_pt); 
%min,max,mean
max_one = max(y_in_range)
        min_one = min(y_in_range)
        mean_one=mean(y_in_range)
        set(handles.minimum, 'String',min_one)
        set(handles.maximum, 'String',max_one)
        set(handles.mean, 'String',mean_one)

Answer 1

[Azzi Abdelmalek]

x1= get(handles.min,'string')

% is a string variable. Use instead

x1= str2double(get(handles.min,'string'))

%the same thing to store your data in a string property

set(handles.minimum, 'String',num2str(min_one))

[rafi abdul]

thank you.its working