??? Attempt to call constructor line with incorrect letter case.

This is the code i have written:

y = [1 .7 -.45 -0.6];
x = [.8 -.44 .36 .02];
t = -20 : 1 : 20;
imp = (t == 0);
j = filter(x,y,imp);
stem(t,j)

and i am getting this on the command window.

Attempt to call constructor line with incorrect letter case.

Error in ==> specgraph.stemseries.stemseries at 22
hMarker= line('hittest','off',...

Error in ==> stem at 83
            h = [h specgraph.stemseries('YData',datachk(y(:,k)),
            xdata{:},...

Error in ==> dspprac7 at 9
stem(t,j)

i have uninstalled matlab and then also installed from another source. but sa,e error is repeated.

[Harsha Medikonda]

which version of Matlab are you using?

[Geoff Hayes]

jeni - just after the error is raised, in the Command Window type

 which line -all

This will return all functions, scripts, classes, variables named line. I did the following and observed

 line=33; % create a silly variable
 which line -all

    line is a variable. 
    built-in (/Applications/MATLAB_R2014a.app/toolbox/matlab/graphics/line)

It may be that you have a user-defined file (class, script, function, etc.) or that has the same name as line and so is conflicting with it. The solution is to rename your file so that it does not conflict with the MATLAB built-in function.

Also, ensure that you do not have any folders named line as well.

[sudhir ingole]

had to face same problem,but resolved .Thanks