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MATLAB Central > MATLAB Newsreader > How to check whether the curve is concave? 

Subject: How to check whether the curve is concave? From: Marco Wu Date: 3 Oct, 2011 16:33:26 Message: 1 of 7 
Dear all, 
Subject: How to check whether the curve is concave? From: someone Date: 3 Oct, 2011 18:41:42 Message: 2 of 7 
"Marco Wu" wrote in message <j6co4m$21q$1@newscl01ah.mathworks.com>... 
Subject: How to check whether the curve is concave? From: Marco Wu Date: 3 Oct, 2011 18:54:16 Message: 3 of 7 
But it seems like you ignore the fact that there could be more than one Y value for the same X, if I convert the pol2cart coordinate. The 2nd order derivative should only work for unique Y value for giving any given X. 
Subject: How to check whether the curve is concave? From: Matt J Date: 3 Oct, 2011 19:17:31 Message: 4 of 7 
"Marco Wu" wrote in message <j6d0co$2qn$1@newscl01ah.mathworks.com>... 
Subject: How to check whether the curve is concave? From: someone Date: 3 Oct, 2011 19:24:27 Message: 5 of 7 
"Marco Wu" wrote in message <j6d0co$2qn$1@newscl01ah.mathworks.com>... 
Subject: How to check whether the curve is concave? From: FDR Date: 18 Nov, 2011 22:18:11 Message: 6 of 7 
"Marco Wu" wrote in message <j6d0co$2qn$1@newscl01ah.mathworks.com>... 
Subject: How to check whether the curve is concave? From: Roger Stafford Date: 19 Nov, 2011 03:19:13 Message: 7 of 7 
"Marco Wu" wrote in message <j6co4m$21q$1@newscl01ah.mathworks.com>... 
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