Hi Lawrence,


Here are the major things in zplot

1. When you plot a file, zplot converts it to a binary file.
  zplot knows about several file types

  file.nta --> these are produced by spectre when using the "nutascii" format.
  file.raw --> these are produced by LTSpice using the ascii raw file output
  file.st1 --> this is plain ascii file. The first line should be the names of each  column
                   Then each following line should be on row of data. for example :

                    Time    sinx         cosx
                     0.0       0.0000   1.0000
                     0.1       0.0998   0.9950
                     0.2       0.1987   0.9801
                       .
                       .
                       .

   Each of these files would be converted to a binary file by zsim. If you want to replot the data later you can plot the binary file directly, and avoid the time to reconvert it

2. zplot always creates a    "file.cmd" when you quit.
     You can use this file to get back to were you were when you quit by using the "-a" command line option. In this case, zplot assumes there is a file with the same basename as the first binary file you are plotting, but with the .cmd extension. You can easily edit the .cmd file yourself as desired. You can also use the "-c file.cmd" command line option to use a specific .cmd file with any name.

3. you can plot as many files as you want at the same time. Just list them all on the command line.

  zplot   file1.nta   file2.nta   file3.nta



4. Once you're in zplot the major commands are 

    n - node list (scroll down to the signal you want to plot and hit enter to mark it. Hit ESC when done marking all the signals you want to plot

  a - add a signal by name. just type the name directly.

  d - delete signal by name

  A - Add panel
  D - Delete panel
  B - Add panel below

  m x - major divisions x axis
  m y - major divisions y axis

  t  x - tics x
  t  y - tics y

  z - zoom on x axis using the mouse middle button

  x - set x limits by typing in two numbers (you can use the keyword "lim" in place of a number, in which case it is the minimum or maximum

        0   10
        0    lim
        lim 5
        lim lim


y  - set y limits by typing in two numbers

f x - format x axis ("s" - scientific "f" - fixed) then give the number of digits
f y - format y axis

T - Title of plot
X - Title of X axis
Y - Title of Y axis

s - scale x axis by a scale factor



P l - plot landscape (it prints the file post.pdf)

w - set the width of the printed lines in post.pdf. It does not affect the with on lines on the screen. You can see the current value of w in the lower right corner of the screen.

g - graphics

g l - graphics line
g a - graphics arrow
g 2 - graphics double arrow

g m - move the selected graphic up down left right. Hit ENTER when done, or ESC to abandon
g t - graphic text - mark location with mouse button 1. Type text, and hit ENTER when done, ESC to abondon

you can select graphics with mouse button 3


r - redraw screen

Y - Toggle showing the signal names on the left hand side. After hit Shift-Y then hit "r" to redraw the screen. You should see the signal names go away, or come back

----------------

Mouse button 1 - measure a y value, or delta y value
Mouse button 2 - measure a x value, or a delta x value