Calculator
Menu location: Tools_StatsDirect Calculator.
The StatsDirect calculator can be used both within StatsDirect and independently as a replacement for the Windows calculator. The calculator evaluates expressions in the form of simple arithmetic or more complex algebra.
All calculations are performed in IEEE-754 double precision (64-bit).
The 'save' button copies the expression currently evaluated and its result to a list from which you can select saved expressions to paste into new ones.
When you close the calculator it will paste saved expressions and results into a report in StatsDirect if the "save results to report on exit" box at the bottom left of the calculator is checked.
Constants | |
PI | 3.14159265358979323846 (p) |
EE | 2.71828182845904523536 (e) |
Arithmetic Functions | |
ABS | absolute value |
CLOG | common (base 10) logarithm |
CEXP | anti log (base 10) |
EXP | anti log (base e) |
LOG | natural (base e, Napieran) logarithm |
LOGIT | logit: log(p/(1-p), p=proportion |
ALOGIT | antilogit: exp(l)/1+exp(l), l=logit |
SQR or SQRT | square root |
! | factorial (maximum 170.569) |
LOG! | log factorial |
IZ | normal deviate for a p value |
UZ | upper tail p for a normal deviate |
LZ | lower tail p for a normal deviate |
TRUNC or FIX | integer part of a real number |
CINT | real number rounded to nearest integer |
INT | real number truncated to integer closest to zero |
Please note that the largest factorial allowed is 170.569398315538748, but you can work with Log factorials via the LOG! function, e.g. LOG!(272).
Arithmetic Operators | |
^ | exponentiation (to the power of) |
+ | addition |
- | subtraction |
* | multiplication |
/ | division |
\ | integer division |
Calculations give an order of priority to arithmetic operators, this must be considered when entering expressions. For example, the result of the expression "6 - 3/2" is 4.5 and not 1.5 because division takes priority over subtraction.
Priority of arithmetic operators in descending order
- Exponentiation (^)
- Negation (-X) (Exception = x^-y; i.e. 4^-2 is 0.0625 and not -16)
- Multiplication and Division (*, /)
- Integer Division (\)
- Addition and Subtraction (+, -)
Trigonometric Functions | |
ARCCOS | arc cosine |
ARCCOSH | arc hyperbolic cosine |
ARCCOT | arc cotangent |
ARCCOTH | arc hyperbolic cotangent |
ARCCSC | arc cosecant |
ARCCSCH | arc hyperbolic cosecant |
ARCTANH | arc hyperbolic tangent |
ARCSEC | arc secant |
ARCSECH | arc hyperbolic secant |
ARCSIN | arc sine |
ARCSINH | arc hyperbolic sine |
ATN | arc tangent |
COS | cosine |
COT | cotangent |
COTH | hyperbolic cotangent |
CSC | cosecant |
CSCH | hyperbolic cosecant |
SIN | sine |
SINH | hyperbolic sine |
SECH | hyperbolic secant |
SEC | secant |
TAN | tangent |
TANH | hyperbolic tangent |
To convert degrees to radians, multiply degrees by pi/180. To convert radians to degrees, multiply radians by 180/pi.
Logical Functions | |
AND | logical AND |
NOT | logical NOT |
OR | logical OR |
< | less than |
= | equal to |
> | greater than |