Resize Matrix
Resizes a matrix (preserving contents) by specifying the desired output dimensions or a scaling factor.
resize_matrix( heightmap, scale = 1, width = NULL, height = NULL, method = "bilinear" )
heightmap |
The elevation matrix. |
scale |
Default '0.5'. The amount to scale down the matrix. Scales using bilinear interpolation. |
width |
Default 'NULL'. Alternative to 'scale' argument. The desired output width. If 'width' is less than 1, it will be interpreted as a scaling factor– e.g. 0.5 would halve the resolution for the width. |
height |
Default 'NULL'. Alternative to 'scale' argument. The desired output width. If 'height' is less than 1, it will be interpreted as a scaling factor– e.g. 0.5 would halve the resolution for the height. |
method |
Default 'bilinear'. Method of interpolation. Alteratively 'cubic', which is slightly smoother, although current implementation slightly scales the image. |
#Reduce the size of the monterey bay dataset by half montbaysmall = resize_matrix(montereybay, scale=0.5) montbaysmall %>% sphere_shade() %>% plot_map() #Reduce the size of the monterey bay dataset from 540x540 to 100x100 montbaysmall = resize_matrix(montereybay, width = 100, height = 100) montbaysmall %>% sphere_shade() %>% plot_map() #Increase the size of the volcano dataset 3x volcanobig = resize_matrix(volcano, scale=3) volcanobig %>% sphere_shade() %>% plot_map() #Increase the size of the volcano dataset 2x, using cubic interpolation volcanobig = resize_matrix(volcano, scale=3, method="cubic") volcanobig %>% sphere_shade() %>% plot_map()
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