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小木虫论坛-学术科研互动平台 » 计算模拟区 » 仿真模拟 » MAPLE & MathCAD » 【求助】(在线等)maple中这个符号矩阵为什么生不成？
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truewz

至尊木虫 (文坛精英)

[交流] 【求助】(在线等)maple中这个符号矩阵为什么生不成？ 已有3人参与

一个30X30的符号矩阵，请高手指点，谢谢

[ Last edited by truewz on 2010-6-7 at 17:04 ]
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扫地虫
1楼 2010-06-06 13:51:24
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truewz

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zzuwangshilei:积极参与 2010-06-06 15:53:23
引用回帖:
Originally posted by urion at 2010-06-06 15:12:43:
你的字符没有定义变量吧

楼上的，估计不是这个原因，我设置了另一个类似的矩阵可以生成，并未预先定义字符变量
Q:=matrix([[cos(alpha), f*j*k*sin(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [cos(alpha), f*j*k*sin(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [cos(alpha), f*j*k*sin(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0],
           [-sin(alpha),cos(alpha),0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,ex_2,ex_1,0,0,0,0,0,0,0,0,0,0,0]]);
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扫地虫
3楼2010-06-06 15:28:02
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urion

铁杆木虫 (职业作家)
zzuwangshilei:积极参与 2010-06-06 15:53:05
truewz(金币+1): 2010-06-06 15:55:41
你的字符没有定义变量吧
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2楼2010-06-06 15:12:43
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maplesim

★ ★
robert2020(金币+2):多谢提供解答，欢迎常来仿真模拟版交流！ 2010-06-07 22:20:17
首先不能用D作为变量名，你可以看到错误信息，D是Maple内部的微分算子。

所以可以用DD:= Matrix(........)


输出：

双击上面的输出，显示矩阵内容：


检查数据类型：
type(DD, Matrix);
                        true

用鼠标右键点击上面的矩阵，可以从右键菜单中选择要进行的操作。
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4楼2010-06-07 13:25:04
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maplesim

★
robert2020(金币+1):多谢提供解答，欢迎常来仿真模拟版交流！ 2010-06-07 22:20:36
此外，matrix命令早已经在最近几个Maple版本中废弃。
如果在帮助中输入matrix，可以得到下面的信息。
Important: The matrix command has been deprecated.  Use the superseding command Matrix instead.
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5楼2010-06-07 13:29:25
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