http://www.mapleprimes.com/questions/80842-accessing-Data-Of-3D-Plot- en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Fri, 12 Jun 2026 01:35:37 GMT Fri, 12 Jun 2026 01:35:37 GMT The latest answers and comments added to the Question, 'accessing data' of 3D plot ? http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/questions/80842-accessing-Data-Of-3D-Plot- http://www.mapleprimes.com/questions/80842-accessing-Data-Of-3D-Plot-?ref=Feed:MaplePrimes:'accessing data' of 3D plot ?:Comments#answer81094 <p>Yes, the Array arr only contains the z values.&nbsp; the GRID structure containing that Array has its first and second operands<br /> a..b, c..d, corresponding to the intervals for the x and y variables.&nbsp; The grid points are equidistant, so if arr is 1..m by <br /> 1..n, the data points are [a + (i-1)*(b-a)/(m-1), c + (j-1)*(d-c)/(n-1), arr[i,j]] for i from 1 to m and j from 1 to n.<br /> <br /> If you make your plot3d parametric, e.g.</p> <pre> plot3d([x, y, f(x,y)], x = a .. b, y = c .. d) </pre> <p>instead of a GRID structure you will get a MESH containing an Array(1..m, 1..n, 1..3) where the [i,j,1..3] entries are the x,y and z<br /> values for the data points.&nbsp; You may find this more convenient to work with.</p> <p>Yes, the Array arr only contains the z values.&nbsp; the GRID structure containing that Array has its first and second operands<br /> a..b, c..d, corresponding to the intervals for the x and y variables.&nbsp; The grid points are equidistant, so if arr is 1..m by <br /> 1..n, the data points are [a + (i-1)*(b-a)/(m-1), c + (j-1)*(d-c)/(n-1), arr[i,j]] for i from 1 to m and j from 1 to n.<br /> <br /> If you make your plot3d parametric, e.g.</p> <pre> plot3d([x, y, f(x,y)], x = a .. b, y = c .. d) </pre> <p>instead of a GRID structure you will get a MESH containing an Array(1..m, 1..n, 1..3) where the [i,j,1..3] entries are the x,y and z<br /> values for the data points.&nbsp; You may find this more convenient to work with.</p> 81094 Tue, 04 May 2010 02:09:59 Z Robert Israel Robert Israel