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why im getting a sparse error in line 4 in editor, actually my cursor is red

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Haseeb Ahmed Janjua
回答： Walter Roberson 2017-10-4
function c = bisection(a,b,tolb)
while (b-a)/2> tolb
midp=a+b/2;
if pb(midp)=0
fprintf("we found answer")
break
end
if pb(a)*pb(midp)<0
b=midp;
else a=midp
end
end

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采纳的回答

Walter Roberson
Walter Roberson 2017-10-4
You have
if pb(midp)=0
MATLAB uses == for comparisons, not =

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