home *** CD-ROM | disk | FTP | other *** search
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- NAME
- sc - spread sheet calculator ("visicalc-like")
-
- SYNOPSIS
- sc [ _f_i_l_e ]
-
-
- DESCRIPTION
- _V_c is a calculator that is based on rectangular tables, in
- much the same style as Visicalc or Lotus 123. When it is
- invoked it presents you with an empty table organised as
- rows and columns of cells. Each cell may have a label
- string associated with it and an expression. The expression
- may be a constant or it may compute something based on other
- entries.
-
- When _v_c is running, the screen is divided into four regions:
- the top line is for entering commands, the second line is
- for messages from _v_c, the third line and the first four
- columns show the row and column numbers, and the rest of the
- screen forms a window looking at the table. _v_c has two
- cursors: a cell cursor (indicated by a '<' on the screen)
- and a character cursor (indicated by the terminals hardware
- cursor). The cell and character cursors are often the same.
- They will differ when a long command is being typed on the
- top line.
-
- Commands which use the terminal's control key will work when
- either a long command is being typed or in "normal" mode.
-
- The cursor control commands and the row, column commands can
- be prefixed by a numeric argument indicating how many times
- the command is to be executed. "^U" can be used before the
- number if the cursor movement is to take place while a
- command is being typed into the command line.
-
- Cursor control commands:
-
-
- ^N Move the cell cursor to the next row.
-
-
- ^P Move the cell cursor to the previous row.
-
-
- ^F Move the cell cursor forward one column.
-
-
- ^B Move the cell cursor backward one column.
-
-
- ^H Backspace one character.
-
-
-
- Page 1 (printed 1/5/87)
-
-
-
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- h, j, k, l
- Alternate cursor controls (left, down, up, right).
-
-
- 0 Move the cell cursor to column 0 of the current row.
-
-
- $ Move the cell cursor to the last valid column in the
- current row.
-
-
- Cell entry and editing commands:
-
-
- = Prompts for an expression which will be evaluated
- dynamically to produce a value for the cell pointed at
- by the cell cursor. This may be used in conjunction
- with ^V to make one entries value be dependent on
- anothers.
-
-
- " Enter a label for the current cell.
-
-
- < Enter a label that will be flushed left against the
- left edge of the cell.
-
-
- > Enter a label that will be flushed right against the
- right edge of the cell.
-
-
- x Clears the current cell.
-
-
- e Edit the value associated with the current cell. This
- is identical to '=' except that the command line starts
- out containing the old value or expression associated
- with the cell.
-
-
- E Edit the string associated with the current cell. This
- is the same as either "leftstring", "rightstring", or
- "label", with the additional fact that the command line
- starts out with the old string.
-
-
- m Mark a cell to be used as the source for the copy
- command.
-
-
- c Copy the last marked cell to the current cell, updating
-
-
-
- Page 2 (printed 1/5/87)
-
-
-
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- the row and column references.
-
-
- ^T Toggle cell display. The current cell's contents are
- displayed in line one when no command being entered or
- edited. ^T turns the display on or off.
-
-
- File operations
-
-
- G Get a new database from a file.
-
-
- P Put the current database into a file.
-
-
- W Write a listing of the current database in a form that
- matches its appearance on the screen. This differs
- from the "put" command in that "put"s files are
- intended to be reloaded with "get", while "write"
- produces a file for people to look at.
-
-
- T Write a listing of the current database to a file, but
- put ":"s between each field. This is useful for
- tables that will be further formatted by the _t_b_l
- preprocessor of _n_r_o_f_f.
-
-
- M Merges the database from the named file into the
- current database. Values, expressions and names
- defined in the named file are written into the current
- file, overwriting the existing entries at those
- locations.
-
-
- Row and Column operations. Members of this class of
- commands can be used on either rows or columns. The second
- letter of the command is either a column designator (one of
- the characters c, j, k, ^N, ^p) or a row designator (one of
- r, l, h, ^B, ^F). Commands which move or copy cells also
- modify the variable references in affected cell expressions.
- Variable references may be frozen by using the "fixed"
- operator.
-
-
- ar, ac
- Creates a new row (column) immediately following the
- current row (column). It is initialized to be a copy
- of the current one.
-
-
-
-
- Page 3 (printed 1/5/87)
-
-
-
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- dr, dc
- Delete this row (column).
-
-
- pr, pc, pm
- Pull deleted rows (columns) back into the spread sheet.
- The last deleted set of cells is put back into the
- spread sheet at the current location. _P_r inserts
- enough rows to hold the data. _P_c inserts enough
- columns to hold the data. _P_m (merge) does not insert
- rows or columns, but overwrites the cells beginning at
- the current cursor location.
-
-
- ir, ic
- Insert a new row (column) by moving the row (column)
- containing the cell cursor, and all following, down
- (right) one. The new position will be empty.
-
-
- zr, zc
- Hide ("zap") the current row (column). This keeps a
- row or column from being displayed but keeps it in the
- data base.
-
-
- vr, vc
- Removes expressions from the affected rows (columns),
- leaving only the values which were in the cells before
- the command was executed.
-
-
- sr, sc
- Show hidden rows (columns). Type in a range of rows or
- columns to be revealed. The command default is the
- first range of rows or columns currently hidden.
-
-
- f Sets the output format to be used for printing the
- numbers in each cell in the current column. Type in
- two numbers which will be the width in characters of a
- column and the number of digits which will follow the
- decimal point. Note that this command has only a
- column version and does have a second letter.
-
-
- Miscellaneous commands:
-
-
- ^C Exit from _v_c. If you were editing a named file, and
- you modified it, then it will ask about saving before
- exiting.
-
-
-
- Page 4 (printed 1/5/87)
-
-
-
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- q Alternate exit command.
-
-
- ? Types a brief helpful message.
-
-
- / Copy a region to the area specified by the current
- cell.
-
-
- ^G or ESC
- Abort the current long command.
-
-
- ^R Redraw the screen.
-
-
- ^V Types, in the long command line, the name of the cell
- being pointed at by the cell cursor. This is used when
- typing in expressions to refer to entries in the table.
-
-
- ^E Types, in the long command line, the expression of the
- cell being pointed at by the cell cursor.
-
-
- ^A Types, in the long command line, the value of the cell
- being pointed at by the cell cursor.
-
-
- Expressions that are used with the '=' and 'e' commands have
- a fairly conventional syntax. Terms may be variable names
- (from the ^V command), parenthesised expressions, negated
- terms, and constants. Rectangular regions of the screen may
- be operated upon with '@' functions such as sum (@sum),
- average (@avg) and product (@prod). Terms may be combined
- using many binary operators. Their precedences (from
- highest to lowest) are: *,/; +,-; <,=,>,<=,>=; &; |; ?.
-
-
- e+e Addition.
-
-
- e-e Subtraction.
-
-
- e*e Multiplication.
-
-
- e/e Division.
-
-
-
-
-
- Page 5 (printed 1/5/87)
-
-
-
-
-
-
- SC(1) UNIX 3.0 SC(1)
-
-
-
- @sum(v:v) Sum all valid (nonblank) entries in the
- region whose two corners are defined by the
- two variable (cell) names given.
-
-
- @avg(v:v) Average all valid (nonblank) entries in the
- region whose two corners are defined by the
- two variable (cell) names given.
-
-
- @prod(v:v) Multiply together all valid (nonblank)
- entries in the region whose two corners are
- defined by the two variable (cell) names
- given.
-
-
- e?e:e Conditional: If the first expression is true
- then the value of the second is returned,
- otherwise the value of the third is.
-
-
- <,=,>,<=,>= Relationals: true iff the indicated relation
- holds.
-
-
- &,| Boolean connectives.
-
-
- fixed To make a variable not change automatically
- when a cell moves, put the word fixed in
- front of the reference. I.e. B1*fixed C3
-
-
-
- SEE ALSO
- bc(1), dc(1)
-
-
- BUGS
- Expression reevaluation is done in the same top-to-bottom,
- left-to-right manner as is done in other spread sheet
- calculators. This is silly. A proper following of the
- dependency graph with (perhaps) recourse to relaxation
- should be implemented.
-
- At most 200 rows and 40 columns.
-
-
-
-
-
-
-
-
-
- Page 6 (printed 1/5/87)
-
-
-
-