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4
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1 function mesh (x, y, z) |
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2 |
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3 # usage: mesh (x, y, z) |
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4 # |
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5 # See also: plot, semilogx, semilogy, loglog, polar, meshdom, contour, |
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6 # bar, stairs, gplot, gsplot, replot, xlabel, ylabel, title |
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7 |
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8 if (nargin == 1) |
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9 z = x; |
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10 if (is_matrix (z)) |
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11 set hidden3d; |
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12 set data style lines; |
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13 set surface; |
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14 set nocontour; |
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15 set noparametric; |
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16 set view 60, 30, 1, 1 |
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17 gsplot (z); |
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18 else |
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19 error ("mesh: argument must be a matrix"); |
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20 endif |
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21 elseif (nargin == 3) |
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22 if (is_vector (x) && is_vector (y) && is_matrix (z)) |
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23 xlen = length (x); |
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24 ylen = length (y); |
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25 if (xlen == rows (z) && ylen == columns (z)) |
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26 if (rows (x) == 1) |
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27 x = x'; |
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28 endif |
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29 len = 3 * ylen; |
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30 zz = zeros (xlen, ylen); |
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31 k = 1; |
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32 for i = 1:3:len |
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33 zz(:,i) = x; |
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34 zz(:,i+1) = y(k) * ones (xlen, 1); |
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35 zz(:,i+2) = z(:,k); |
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36 k++; |
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37 endfor |
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38 set hidden3d; |
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39 set data style lines; |
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40 set surface; |
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41 set nocontour; |
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42 set parametric; |
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43 set view 60, 30, 1, 1 |
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44 gsplot (zz); |
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45 else |
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46 disp ("mesh: rows (z) must be the same as length (x)"); |
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47 error (" and columns (z) must be the same as length (y)"); |
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48 endif |
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49 else |
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50 error ("mesh: x and y must be vectors and z must be a matrix"); |
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51 endif |
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52 else |
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53 error ("usage: mesh (z)"); |
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54 endif |
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55 |
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56 endfunction |
