NAME: tvplus PURPOSE: enhanced version of tvscl CATEGORY: quick exploration of 2D arrays CALLING SEQUENCE: tvplus,z2d [,cellsize] INPUTS: z2d: 2D array to visualize cellsize: (optional) this is the size (in pixel) of the square representing 1 array element. By default, this size is computed automatically in order that the size of the plotting window do not exceed the screen size. If the user specify a large value of cellsize that forces tvplus to create a window larger than the screen, a "scrolling window" will be displayed instead of a regular window. Unfortunately the nice fonctionnalities of tvplus are not coded for "scrolling window" case... KEYWORD PARAMETERS: BOTTOM: The lowest color index of the colors to be loaded in the bar. default is 0. C_NAN: The color number that should be used for the NaN values. default value is !d.n_colors < 255 C_MASK: The color number that should be used for the mask values. default value is 0 OFFSET: 2 elements vector used by tvplus itself when shoing zoom. It is used to shift the ranges of xaxis and yaxis. For example: tvplus,sst[x1:x2,y1:y2],offest=[x1,y1] MASK: The mask value. Note that if abs(mask) < 1.e6, then the exact value of the mask is used to find the maskwd point. if abs(mask) > 1.e6, the test to find the masked value is ge abs(mask)/10. This is necessary to avoid the rounding errors MIN and MAX: scalars used to specify the min and max values of the color bar. default is from 0 to !d.n_colors < 255 NCOLORS: This is the number of colors in the color bar. default is !d.n_colors<255 -1 NOINTERP: used this keyword if you don't whant that the values are interpolated between 0 (or min) and !d.n_colors < 255 (or max). This can be for example usefull when working on byte type arrays. NOUSEINFOS: activite to supress the printed message explaining how to use tvplus WINDOW: Number of the window used to display the array values. default is window number 0. OUTPUTS: no (except the printed finformations, see below) COMMON BLOCKS: no SIDE EFFECTS: use your mouse to scan the array values... left button : mouse position and associated array value middle button: use it twice to define a zoom box right button : quit RESTRICTIONS: the nice fonctionnalities of tvplus are not coded for "scrolling window" case... EXAMPLE: IDL> tvplus, dist(100)