HP -42S Manual page 33

Name Description
RND Round the number in the x-register using the current display format.
RNRM Return the row norm of the matrix in the x-register.
ROTXY Rotate the 36-bit number in the y-register by x bits.
RSUM Return the row sum of each row of the matrix in the x-register and returns the sums in
a column matrix.
RTN Return. In a running program, branches the program pointer back to the line following
the most recent XEQ instruction. If there is no matching XEQ instruction, program
execution halts. From the keyboard, RTN moves the program pointer to line 00 of the
current program.
R<>R Row swap row. Swaps the elements in rows x and y in the indexed matrix.
R↑ Roll up the contents of the four stack registers one position.
R↓ Roll down the contents of the four stack registers one position.
Run/stop. Runs a program (beginning at the current program line) or stops a running
R/S
program. In program-entry mode, inserts a STOP instruction into the program.
SCI Select scientific notation display format. Parameter: number of digits (indirect
allowed)
SDEV Standard deviation. Returns s
SEED Store a seed for the random number generator.
SF Set flag nn (00 ≤ nn ≤ 35; 81 ≤ nn ≤ 99). Parameter: flag number (indirect allowed)
SIGN Sign. Return 1 for x ≥ 0, –1 for x < 0, and 0 for non-numbers. Returns the unit vector
of a complex number.
SIN Sine. Returns sin(x).
SlNH Hyperbolic sine. Returns sinh(x).
SIZE Set the number of storage registers. Parameter: number of registers.
SLOPE Return the slope of the linear transformation of the current curve-fitting model.
SOLVE Solve for an unknown variable. Parameter: variable name (indirect allowed)
SORT Square root. Returns √x.
SST Single step. Moves the program pointer to the next program line. (Not programmable.)
ST0 Store a copy of x into a destination register or variable. Parameter: register or variable
(indirect allowed)
STO+ Store addition. Adds x to an existing register or variable. Parameter: register or
variable (indirect allowed)
STO– Store subtraction. Subtracts x from an existing register or variable. Parameter: register
or variable (indirect allowed)
ST0× Store multiplication. Multiplies an existing register or variable by x. Parameter:
register or variable (indirect allowed)
ST0÷ Store division. Divides an existing register or variable by x. Parameter: register or
variable (indirect allowed)
STOEL Store element. Stores a copy of x into the current element of the indexed matrix.
STOlJ Moves the row- and column-pointers to I = x and J = y in the indexed matrix.
STOP
Stop program execution. (R/S in program entry mode).
STR? If the x-register contains an Alpha string, execute the next program line; if the x-
register does not contain an Alpha string, skip the next program line.
SUM Returns the sums Σx and Σy into the x- and y-registers.
TAN Tangent. Returns tan(x).
TANH Hyperbolic tangent. Returns tanh(x).
TONE Sounds a tone. Parameter: tone number (0–9) (indirect allowed)
TRACE Select Trace printing mode, which prints a record of keystrokes and results.
TRANS Return the transpose of the matrix in the x-register.
UVEC Unit vector. Return the unit vector for the matrix or complex number in the x-register.
VARMENU Create a variable menu using MVAR instructions following the specified global label.
Parameter: global program label. (indirect allowed)
VIEW View the contents of a register or variable. Parameter: register or variable (indirect
allowed)
and s using the current statistical data.
x y