Fw: [討論] 求三角形面積

看板Math作者royt (Engineer)時間12年前 (2013/03/07 16:27)推噓2(2推 0噓 4→)

留言6則, 2人參與討論串1/2 (看更多)

※ [本文轉錄自 MATLAB 看板 #1HE4qka_ ] 作者: royt (Engineer) 看板: MATLAB 標題: [討論] 求三角形面積時間: Thu Mar 7 16:17:47 2013 問題是輸入三個座標點算出三點所圍成的三角形面積我先用把兩點的距離分別算出來再帶入海龍公式 % MS2013 HW#1: To caculate the area of the triangular function area = func_hw1(x1,y1,x2,y2,x3,y3) % print the position fprintf('The first point of the triangle is (%5.2f, %5.2f)\n', x1, y1) fprintf('The second point of the triangle is (%5.2f, %5.2f)\n', x2, y2) fprintf('The third point of the triangle is (%5.2f, %5.2f)\n\n', x3, y3) % calculate the distance between points distance_12 = sqrt( (x1 - x2)^2 + (y1 - y2)^2 ); distance_13 = sqrt( (x1 - x3)^2 + (y1 - y3)^2 ); distance_23 = sqrt( (x2 - x3)^2 + (y2 - y3)^2 ); % put the distance into Helen formula temp = (distance_12 + distance_13 + distance_23)/2; area = sqrt( temp * (temp - distance_12) * (temp - distance_13) * (temp - distance_23) ); fprintf('The area of the triangle is %7.2', area) % end 可是測出來誤差過大 http://ppt.cc/d4sK 請問是哪個地方出問題嗎? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.7.214 ※ 發信站: 批踢踢實業坊(ptt.cc) ※ 轉錄者: royt (140.112.7.214), 時間: 03/07/2013 16:27:39

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