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Re: Plotting Lines in 3D
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From: |
Tatsuro MATSUOKA |
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Subject: |
Re: Plotting Lines in 3D |
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Date: |
Thu, 6 Aug 2015 15:59:49 +0900 (JST) |
----- Original Message -----
> From: Thomas D. Dean
> To: "address@hidden"
> Cc:
> Date: 2015/8/6, Thu 13:11
> Subject: Plotting Lines in 3D
>
> I have an array of 100 pairs of points, 100 rows, 6 columns, the columns
> representing x1, y1, z1 x2, y2, z2.
> A straight line from Point 1 to Point 2.
>
> I want to plot this in 3D, resulting in 100 straight lines.
>
> I tried
> hold on; for idx=1:100 plot3(X(idx,:)) endfor; hold off;
> strange.
>
> plot3(X(1,:)) does not result in a straight line. The (wrong?) way I read
> the
> help, it should.
>
> How do I do this?
>
> Tom Dean
>
> X =
> -0.24537 0.00000 3.02878 -0.24537 -0.74948 3.02878
> -0.21714 0.00000 3.02693 -0.21714 0.66326 3.02693
> -0.19216 0.00000 3.02529 -0.19216 -0.58695 3.02529
> -0.17005 0.00000 3.02385 -0.17005 0.51943 3.02385
> -0.15049 0.00000 3.02256 -0.15049 -0.45967 3.02256
> -0.13317 0.00000 3.02143 -0.13317 0.40679 3.02143
> -0.11785 0.00000 3.02042 -0.11785 -0.35999 3.02042
> -0.10430 0.00000 3.01954 -0.10430 0.31857 3.01954
> -0.09230 0.00000 3.01875 -0.09230 -0.28192 3.01875
> -0.08168 0.00000 3.01805 -0.08168 0.24949 3.01805
> -0.07228 0.00000 3.01744 -0.07228 -0.22079 3.01744
> -0.06397 0.00000 3.01689 -0.06397 0.19539 3.01689
> -0.05661 0.00000 3.01641 -0.05661 -0.17291 3.01641
> -0.05009 0.00000 3.01598 -0.05009 0.15302 3.01598
> -0.04433 0.00000 3.01561 -0.04433 -0.13541 3.01561
> -0.03923 0.00000 3.01527 -0.03923 0.11984 3.01527
> -0.03472 0.00000 3.01498 -0.03472 -0.10605 3.01498
> -0.03072 0.00000 3.01471 -0.03072 0.09385 3.01471
> -0.02719 0.00000 3.01448 -0.02719 -0.08305 3.01448
> -0.02406 0.00000 3.01428 -0.02406 0.07350 3.01428
> -0.02129 0.00000 3.01410 -0.02129 -0.06504 3.01410
> -0.01884 0.00000 3.01394 -0.01884 0.05756 3.01394
> -0.01668 0.00000 3.01379 -0.01668 -0.05094 3.01379
> -0.01476 0.00000 3.01367 -0.01476 0.04508 3.01367
> -0.01306 0.00000 3.01356 -0.01306 -0.03989 3.01356
> -0.24537 -0.00000 2.97122 -0.24537 0.74948 2.97122
> -0.21714 -0.00000 2.97307 -0.21714 -0.66326 2.97307
> -0.19216 -0.00000 2.97471 -0.19216 0.58695 2.97471
> -0.17005 -0.00000 2.97615 -0.17005 -0.51943 2.97615
> -0.15049 -0.00000 2.97744 -0.15049 0.45967 2.97744
> -0.13317 -0.00000 2.97857 -0.13317 -0.40679 2.97857
> -0.11785 -0.00000 2.97958 -0.11785 0.35999 2.97958
> -0.10430 -0.00000 2.98046 -0.10430 -0.31857 2.98046
> -0.09230 -0.00000 2.98125 -0.09230 0.28192 2.98125
> -0.08168 -0.00000 2.98195 -0.08168 -0.24949 2.98195
> -0.07228 -0.00000 2.98256 -0.07228 0.22079 2.98256
> -0.06397 -0.00000 2.98311 -0.06397 -0.19539 2.98311
> -0.05661 -0.00000 2.98359 -0.05661 0.17291 2.98359
> -0.05009 -0.00000 2.98402 -0.05009 -0.15302 2.98402
> -0.04433 -0.00000 2.98439 -0.04433 0.13541 2.98439
> -0.03923 -0.00000 2.98473 -0.03923 -0.11984 2.98473
> -0.03472 -0.00000 2.98502 -0.03472 0.10605 2.98502
> -0.03072 -0.00000 2.98529 -0.03072 -0.09385 2.98529
> -0.02719 -0.00000 2.98552 -0.02719 0.08305 2.98552
> -0.02406 -0.00000 2.98572 -0.02406 -0.07350 2.98572
> -0.02129 -0.00000 2.98590 -0.02129 0.06504 2.98590
> -0.01884 -0.00000 2.98606 -0.01884 -0.05756 2.98606
> -0.01668 -0.00000 2.98621 -0.01668 0.05094 2.98621
> -0.01476 -0.00000 2.98633 -0.01476 -0.04508 2.98633
> -0.01306 -0.00000 2.98644 -0.01306 0.03989 2.98644
> -0.24537 0.00000 3.02878 -0.21714 0.00000 3.02693
> -0.21714 0.00000 3.02693 -0.19216 0.00000 3.02529
> -0.19216 0.00000 3.02529 -0.17005 0.00000 3.02385
> -0.17005 0.00000 3.02385 -0.15049 0.00000 3.02256
> -0.15049 0.00000 3.02256 -0.13317 0.00000 3.02143
> -0.13317 0.00000 3.02143 -0.11785 0.00000 3.02042
> -0.11785 0.00000 3.02042 -0.10430 0.00000 3.01954
> -0.10430 0.00000 3.01954 -0.09230 0.00000 3.01875
> -0.09230 0.00000 3.01875 -0.08168 0.00000 3.01805
> -0.08168 0.00000 3.01805 -0.07228 0.00000 3.01744
> -0.07228 0.00000 3.01744 -0.06397 0.00000 3.01689
> -0.06397 0.00000 3.01689 -0.05661 0.00000 3.01641
> -0.05661 0.00000 3.01641 -0.05009 0.00000 3.01598
> -0.05009 0.00000 3.01598 -0.04433 0.00000 3.01561
> -0.04433 0.00000 3.01561 -0.03923 0.00000 3.01527
> -0.03923 0.00000 3.01527 -0.03472 0.00000 3.01498
> -0.03472 0.00000 3.01498 -0.03072 0.00000 3.01471
> -0.03072 0.00000 3.01471 -0.02719 0.00000 3.01448
> -0.02719 0.00000 3.01448 -0.02406 0.00000 3.01428
> -0.02406 0.00000 3.01428 -0.02129 0.00000 3.01410
> -0.02129 0.00000 3.01410 -0.01884 0.00000 3.01394
> -0.01884 0.00000 3.01394 -0.01668 0.00000 3.01379
> -0.01668 0.00000 3.01379 -0.01476 0.00000 3.01367
> -0.01476 0.00000 3.01367 -0.01306 0.00000 3.01356
> -0.01306 0.00000 3.01356 0.00000 0.00000 3.01270
> -0.24537 0.00000 2.97122 -0.21714 0.00000 2.97307
> -0.21714 0.00000 2.97307 -0.19216 0.00000 2.97471
> -0.19216 0.00000 2.97471 -0.17005 0.00000 2.97615
> -0.17005 0.00000 2.97615 -0.15049 0.00000 2.97744
> -0.15049 0.00000 2.97744 -0.13317 0.00000 2.97857
> -0.13317 0.00000 2.97857 -0.11785 0.00000 2.97958
> -0.11785 0.00000 2.97958 -0.10430 0.00000 2.98046
> -0.10430 0.00000 2.98046 -0.09230 0.00000 2.98125
> -0.09230 0.00000 2.98125 -0.08168 0.00000 2.98195
> -0.08168 0.00000 2.98195 -0.07228 0.00000 2.98256
> -0.07228 0.00000 2.98256 -0.06397 0.00000 2.98311
> -0.06397 0.00000 2.98311 -0.05661 0.00000 2.98359
> -0.05661 0.00000 2.98359 -0.05009 0.00000 2.98402
> -0.05009 0.00000 2.98402 -0.04433 0.00000 2.98439
> -0.04433 0.00000 2.98439 -0.03923 0.00000 2.98473
> -0.03923 0.00000 2.98473 -0.03472 0.00000 2.98502
> -0.03472 0.00000 2.98502 -0.03072 0.00000 2.98529
> -0.03072 0.00000 2.98529 -0.02719 0.00000 2.98552
> -0.02719 0.00000 2.98552 -0.02406 0.00000 2.98572
> -0.02406 0.00000 2.98572 -0.02129 0.00000 2.98590
> -0.02129 0.00000 2.98590 -0.01884 0.00000 2.98606
> -0.01884 0.00000 2.98606 -0.01668 0.00000 2.98621
> -0.01668 0.00000 2.98621 -0.01476 0.00000 2.98633
> -0.01476 0.00000 2.98633 -0.01306 0.00000 2.98644
> -0.01306 0.00000 2.98644 0.00000 0.00000 2.98730
>
>> help plot3
'plot3' is a function from the file
C:\octave\Octave-4.0.0\share\octave\4.0.0\m\plot\draw\plot3.
m
-- Function File: plot3 (X, Y, Z)
-- Function File: plot3 (X, Y, Z, PROP, VALUE, ...)
-- Function File: plot3 (X, Y, Z, FMT)
-- Function File: plot3 (X, CPLX)
-- Function File: plot3 (CPLX)
-- Function File: plot3 (HAX, ...)
-- Function File: H = plot3 (...)
Produce 3-D plots.
Many different combinations of arguments are possible. The
simplest form is
plot3 (X, Y, Z)
in which the arguments are taken to be the vertices of the points
to be plotted in three dimensions. If all arguments are vectors
of the same length, then a single continuous line is drawn. If
all arguments are matrices, then each column of is treated as a
separate line. No attempt is made to transpose the arguments to
make the number of rows match.
Seeing the above, it is obvious that
plot3(X(1,:)) does not result in a straight line.
I tried to plot only the first line,
>> X=[-0.24537 0.00000 3.02878 -0.24537 -0.74948 3.02878];
>> plot3([X(1,1) X(1,4)], [X(1,2) X(1,5)], [X(1,3) X(1,6)]);
gives a straight line.
Please try
hold on; for idx=1:100; plot3([X(idx,1) X(idx,4)], [X(idx,2) X(idx,5)],
[X(idx,3) X(idx,6)]); endfor; hold off;
The above is not elegant so that other people may give better solutions.
Tatsuro