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!AWJan94/Goodies/Graph/Tutorial

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

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!Grapher 2 Tutorial

This tutorial shows how to set up a typical graph of the (most commonly
required) bargraph style.  For more general information about the program & the
other graph styles see the ReadMe file & also the example graphs/drawfiles
accompanying the application.

Suppose we wish to display the data below in the form of a simple bargraph:


Table Showing Unit Sales x 1000 For 1992
======================================================================
            Month
======================================================================
Company     Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec
======================================================================
Acorn       35   32   31   26   24   23   20   17   19   26   32   43
Another     20   16   12   9    8    9    10   11   12   14   17   22
======================================================================


Load up !Grapher 2 (or choose RESET from the program's main menu) - see !ReadMe
for information on loading the program.

1.  Set the graph type required from the 'Graph Type' submenu (found on the main
    menu of the program which is accessed by pressing the menu button over the
    program's icon on the icon bar.).  In this case we want a bar graph - so
    continue to the 'Bar' submenu and select '3-D'.  This style is a simple
    'psuedo 3D' bargraph.

2.  Set up the graph's axis - from the main menu,  select 'Edit Axis'.  This 
    will cause a window to appear (for a fuller explanation of the fields in 
    this window see the !ReadMe file).  Click the mouse in  the 'Graph Title' 
    field (which should read 'none') to place the caret.  Delete 'none'
    (pressing CTRL+U will clear a writeable field) and enter '1992 Sales', 
    pressing return when finished to advance to the next field ('H axis title').
    Again,  clear this field and enter 'Month',  pressing return when finished. 
    This title will appear along the horizontal axis of the graph.  Enter
    'Sales x 1000' into the 'V axis title' field.

    Pressing return now will move the caret up into the icon holding (by
    default) 'Trinity.Bold',  and will cause a menu of currently available
    fonts to pop up in the lower left hand corner of the screen.  Reading
    across the window shows that this icon contains the font to be used for
    the graph title.  Select the required font,  and press return to move on
    to the next icon.  This is the width of the text to be used for the title,
    specified in points.  Leave this as 36.  Pressing return will advance to
    the next field,  also holding 36,  which is the height of text to be used
    for the title.  Leave this unchanged.  Change the other fonts & sizes (for
    axis titles,  the key,  and axis scales) if you wish,  although the
    defaults are adequate for this example.

    Scroll the window down (or enlarge it) to reveal the 'Scales' section.
    Leave the 'Approx Dimensions' unchanged,  and move on to the vertical axis
    'Max' field.  Delete 100 and enter 45 (the largest data value in our data
    set is 43).  Leave 0 in the 'Min' field,  and change the '# of steps' to
    10 - these settings will give a vertical scale running from 0 to 45 with
    10 steps (i.e. 0, 5, 10,...,40, 45).  Enter 12 in the '# of steps/bars'
    field - since we want 12 bars (1 for each month) along the bottom of the
    graph.  Now click on 'Ok' at the bottom of the window,  closing it.

3.  Enter the legends for the axis/key and enter the data to be displayed.
    Select 'Edit Data' from the program's main menu.  Firstly,  enter the
    titles for each bar (column) - click over the field reading 'Column 1'. 
    Clear this field,  and enter 'Jan',  pressing return when done.  This will
    move on to column 2.  Here enter 'Feb' ... and so on until all 12 columns
    have been titled.  The arrows at the left of the field can be used to move
    through the columns.

    When all 12 columns have been titled click over the field reading
    'Dataset 0'.  We have two sets of figures to display here
    ('Acorn' and 'Another').  Delete 'Dataset 0' and enter 'Acorn',  pressing
    return to move on to dataset 1.  Here enter 'Another'.  In the middle of the
    window there is a field titled 'Use datasets 0 to x'.  Change 'x' to 1, 
    this tells the program we wish to show datasets 0 (Acorn) and 1(Another) on
    the graph.

    Ensure that column 1 (Jan) is shown by using the arrows to the left of the
    field,  and dataset 0 (Acorn) again,  using the appropriate arrows.  Give
    the 'Acorn' bars a colour by clicking over one of the 'R',  'G' or 'B'
    fields labelled colour.  This will display a colour selector box.  Set the
    colour you wish to use using the sliders,  and select 'Set'.  This will
    automatically enter the appropriate numbers into the colour fields.  Note
    that if you are using mode 12 only 16 colours will be shown - change to mode
    15 or 21 for a full colour display.  Using the arrows display 'Another'
    (dataset 1).  The colour selector box will be updated to show the current
    colour for this dataset.  Choose another colour and select 'Set' when done.
    Close the colour selector window.

    Click in the 'Height' field,  after ensuring that the column display reads
    '1' (Jan) and dataset 0 (Acorn) is displayed.  Delete the 0 in the height
    field,  and enter the January figure for Acorn (35).  Press return (this
    will advance to column 2 (Feb)) and enter the Febuary figure (32).  Continue
    until values for all 12 months have been entered.  Now return to column 1
    (Jan) and select dataset 1 (Another) using the arrows.  Enter the figure
    for each month of 'Another' from the table into the 'height' field.  We
    will not have a background to our graph,  so select 'Ok' to close the
    window.  Our graph is now set up.

4.  Save the graph definition (if you wish to keep it) - from the main menu,
    go to the 'datafile' submenu of the 'save' submenu,  and save the file in
    the normal manner (i.e. enter a name & drag the icon,  or click on 'Ok' if
    you have already done this).  The resulting file contains all graph
    style/data information and can be reloaded & edited at a later date.

5.  Create the graph - from the 'graph' submenu of the 'save' submenu,  save the
    drawfile in the normal manner.  This drawfile is the graph,  ready for
    loading into !Draw,  !Impression etc.  (Remember a 256 colour mode may need
    to be selected in order to see accurately any colours used).


00000000  21 47 72 61 70 68 65 72  20 32 20 54 75 74 6f 72  |!Grapher 2 Tutor|
00000010  69 61 6c 0a 0a 54 68 69  73 20 74 75 74 6f 72 69  |ial..This tutori|
00000020  61 6c 20 73 68 6f 77 73  20 68 6f 77 20 74 6f 20  |al shows how to |
00000030  73 65 74 20 75 70 20 61  20 74 79 70 69 63 61 6c  |set up a typical|
00000040  20 67 72 61 70 68 20 6f  66 20 74 68 65 20 28 6d  | graph of the (m|
00000050  6f 73 74 20 63 6f 6d 6d  6f 6e 6c 79 0a 72 65 71  |ost commonly.req|
00000060  75 69 72 65 64 29 20 62  61 72 67 72 61 70 68 20  |uired) bargraph |
00000070  73 74 79 6c 65 2e 20 20  46 6f 72 20 6d 6f 72 65  |style.  For more|
00000080  20 67 65 6e 65 72 61 6c  20 69 6e 66 6f 72 6d 61  | general informa|
00000090  74 69 6f 6e 20 61 62 6f  75 74 20 74 68 65 20 70  |tion about the p|
000000a0  72 6f 67 72 61 6d 20 26  20 74 68 65 0a 6f 74 68  |rogram & the.oth|
000000b0  65 72 20 67 72 61 70 68  20 73 74 79 6c 65 73 20  |er graph styles |
000000c0  73 65 65 20 74 68 65 20  52 65 61 64 4d 65 20 66  |see the ReadMe f|
000000d0  69 6c 65 20 26 20 61 6c  73 6f 20 74 68 65 20 65  |ile & also the e|
000000e0  78 61 6d 70 6c 65 20 67  72 61 70 68 73 2f 64 72  |xample graphs/dr|
000000f0  61 77 66 69 6c 65 73 0a  61 63 63 6f 6d 70 61 6e  |awfiles.accompan|
00000100  79 69 6e 67 20 74 68 65  20 61 70 70 6c 69 63 61  |ying the applica|
00000110  74 69 6f 6e 2e 0a 0a 53  75 70 70 6f 73 65 20 77  |tion...Suppose w|
00000120  65 20 77 69 73 68 20 74  6f 20 64 69 73 70 6c 61  |e wish to displa|
00000130  79 20 74 68 65 20 64 61  74 61 20 62 65 6c 6f 77  |y the data below|
00000140  20 69 6e 20 74 68 65 20  66 6f 72 6d 20 6f 66 20  | in the form of |
00000150  61 20 73 69 6d 70 6c 65  20 62 61 72 67 72 61 70  |a simple bargrap|
00000160  68 3a 0a 0a 0a 54 61 62  6c 65 20 53 68 6f 77 69  |h:...Table Showi|
00000170  6e 67 20 55 6e 69 74 20  53 61 6c 65 73 20 78 20  |ng Unit Sales x |
00000180  31 30 30 30 20 46 6f 72  20 31 39 39 32 0a 3d 3d  |1000 For 1992.==|
00000190  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
000001d0  3d 3d 3d 3d 0a 20 20 20  20 20 20 20 20 20 20 20  |====.           |
000001e0  20 4d 6f 6e 74 68 0a 3d  3d 3d 3d 3d 3d 3d 3d 3d  | Month.=========|
000001f0  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000220  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 0a 43 6f  |=============.Co|
00000230  6d 70 61 6e 79 20 20 20  20 20 4a 61 6e 20 20 46  |mpany     Jan  F|
00000240  65 62 20 20 4d 61 72 20  20 41 70 72 20 20 4d 61  |eb  Mar  Apr  Ma|
00000250  79 20 20 4a 75 6e 20 20  4a 75 6c 20 20 41 75 67  |y  Jun  Jul  Aug|
00000260  20 20 53 65 70 20 20 4f  63 74 20 20 4e 6f 76 20  |  Sep  Oct  Nov |
00000270  20 44 65 63 0a 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  | Dec.===========|
00000280  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
000002b0  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 0a 41 63 6f 72  |===========.Acor|
000002c0  6e 20 20 20 20 20 20 20  33 35 20 20 20 33 32 20  |n       35   32 |
000002d0  20 20 33 31 20 20 20 32  36 20 20 20 32 34 20 20  |  31   26   24  |
000002e0  20 32 33 20 20 20 32 30  20 20 20 31 37 20 20 20  | 23   20   17   |
000002f0  31 39 20 20 20 32 36 20  20 20 33 32 20 20 20 34  |19   26   32   4|
00000300  33 0a 41 6e 6f 74 68 65  72 20 20 20 20 20 32 30  |3.Another     20|
00000310  20 20 20 31 36 20 20 20  31 32 20 20 20 39 20 20  |   16   12   9  |
00000320  20 20 38 20 20 20 20 39  20 20 20 20 31 30 20 20  |  8    9    10  |
00000330  20 31 31 20 20 20 31 32  20 20 20 31 34 20 20 20  | 11   12   14   |
00000340  31 37 20 20 20 32 32 0a  3d 3d 3d 3d 3d 3d 3d 3d  |17   22.========|
00000350  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000380  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 0a 0a  |==============..|
00000390  0a 4c 6f 61 64 20 75 70  20 21 47 72 61 70 68 65  |.Load up !Graphe|
000003a0  72 20 32 20 28 6f 72 20  63 68 6f 6f 73 65 20 52  |r 2 (or choose R|
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000003f0  20 6f 6e 20 6c 6f 61 64  69 6e 67 20 74 68 65 20  | on loading the |
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00000560  20 20 53 65 74 20 75 70  20 74 68 65 20 67 72 61  |  Set up the gra|
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00000600  69 73 20 77 69 6e 64 6f  77 20 73 65 65 20 74 68  |is window see th|
00000610  65 20 21 52 65 61 64 4d  65 20 66 69 6c 65 29 2e  |e !ReadMe file).|
00000620  20 20 43 6c 69 63 6b 20  74 68 65 20 6d 6f 75 73  |  Click the mous|
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00000a60  20 66 6f 72 20 74 68 65  20 74 69 74 6c 65 2e 20  | for the title. |
00000a70  20 4c 65 61 76 65 20 74  68 69 73 20 75 6e 63 68  | Leave this unch|
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00000ad0  20 73 63 61 6c 65 73 29  20 69 66 20 79 6f 75 20  | scales) if you |
00000ae0  77 69 73 68 2c 20 20 61  6c 74 68 6f 75 67 68 20  |wish,  although |
00000af0  74 68 65 0a 20 20 20 20  64 65 66 61 75 6c 74 73  |the.    defaults|
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00000b10  72 20 74 68 69 73 20 65  78 61 6d 70 6c 65 2e 0a  |r this example..|
00000b20  0a 20 20 20 20 53 63 72  6f 6c 6c 20 74 68 65 20  |.    Scroll the |
00000b30  77 69 6e 64 6f 77 20 64  6f 77 6e 20 28 6f 72 20  |window down (or |
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00000b50  65 76 65 61 6c 20 74 68  65 20 27 53 63 61 6c 65  |eveal the 'Scale|
00000b60  73 27 20 73 65 63 74 69  6f 6e 2e 0a 20 20 20 20  |s' section..    |
00000b70  4c 65 61 76 65 20 74 68  65 20 27 41 70 70 72 6f  |Leave the 'Appro|
00000b80  78 20 44 69 6d 65 6e 73  69 6f 6e 73 27 20 75 6e  |x Dimensions' un|
00000b90  63 68 61 6e 67 65 64 2c  20 20 61 6e 64 20 6d 6f  |changed,  and mo|
00000ba0  76 65 20 6f 6e 20 74 6f  20 74 68 65 20 76 65 72  |ve on to the ver|
00000bb0  74 69 63 61 6c 20 61 78  69 73 0a 20 20 20 20 27  |tical axis.    '|
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000019ae