The error 'Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.', is coming up for line 30

% anyone see my issue? this is my line 30, 150..:


here line 31 how can I fix?
plot3 (areaX, areay, ( (areaX+areay) *O)); hold on
plot3 (areaX, areay, ( (area+area) *0)+3.5); hold on
plot3 ([areaX; areaX], [areaY; areaY], ( (areaX+areaY)*0):((areaX+areaY)*0)+3.5), 'g');

Answer 1

[Walter Roberson]

plot3 ([areaX; areaX], [areaY; areaY], ( (areaX+areaY)*0):((areaX+areaY)*0)+3.5), 'g');
      1                                2 3           2  1 23           2  1    0     !

You have one more ) than you have (

[Shimelis Abebe]

Okay dear however still If i change there also another error next line?

[Walter Roberson]

plot ([user (nu) . X + user (nu) . VX 1, [user (nu) . Y+user (nu) .VY1,

That code has five ( but four ) . It has two [ but no ] . It abruptly ends after a comma.

Also there are lines where you call ploc3 instead of plot3

[Shimelis Abebe]

thanks any more