Supported Vensim Functions

The following table lists the Vensim functions that are currently supported by SDEverywhere.

Notes:

This is a subset of the full list of Vensim functions that can be found in the Vensim help documentation.
The "C" column shows which functions are supported when C is the code generation target.
The "JS" column shows which functions are supported when JavaScript is the code generation target.
If you have a model that uses a function that is not currently supported, contributions are welcome! Consult with the maintainers on the SDEverywhere discussion board for assistance.
Refer to the Sample Models page for more details on sample models included in this repository that are used to validate SDEverywhere's handling of these functions.

Function	C	JS	Notes
ABS	✅	✅
ACTIVE INITIAL	✅	✅
ALLOCATE AVAILABLE	✅	❌	See caveats for SDEverywhere's implementation of this function
ARCCOS	✅	✅
ARCSIN	✅	✅
ARCTAN	✅	✅
COS	✅	✅
DELAY1	✅	✅
DELAY1I	✅	✅
DELAY3	✅	✅
DELAY3I	✅	✅
DELAY FIXED	✅	❌
DEPRECIATE STRAIGHTLINE	⚠️	❌	The `fisc` (fiscal period) argument is not currently supported.
ELMCOUNT	✅	✅
EXP	✅	✅
GAME	✅	✅	Full support for the `GAME` function was added in August 2024. See #483 for more details.
GAMMA LN	✅	❌
GET DATA BETWEEN TIMES	✅	✅
GET DIRECT CONSTANTS	✅	✅
GET DIRECT DATA	✅	✅
GET DIRECT LOOKUPS	✅	✅
GET DIRECT SUBSCRIPT	⚠️	⚠️	Currently only `csv` files are supported for this function (no `xlsx` support yet).
IF THEN ELSE	✅	✅
INITIAL	✅	✅
INTEG	✅	✅
INTEGER	✅	✅
LN	✅	✅
LOOKUP BACKWARD	✅	✅
LOOKUP FORWARD	✅	✅
LOOKUP INVERT	✅	✅
MAX	✅	✅
MIN	✅	✅
MODULO	✅	✅
NPV	✅	✅
POWER	✅	✅
PULSE	✅	✅
PULSE TRAIN	✅	✅
QUANTUM	✅	✅
RAMP	✅	✅
SAMPLE IF TRUE	✅	✅
SIN	✅	✅
SMOOTH	✅	✅
SMOOTHI	✅	✅
SMOOTH3	✅	✅
SMOOTH3I	✅	✅
SQRT	✅	✅
STEP	✅	✅
TAN	✅	✅
TREND	✅	✅
VECTOR ELM MAP	✅	✅
VECTOR SELECT	⚠️	⚠️	Currently the only supported `numerical_action` values are 0 (sum) and 3 (max).
VECTOR SORT ORDER	✅	✅
VMAX	✅	✅
VMIN	✅	✅
WITH LOOKUP	✅	✅
XIDZ	✅	✅
ZIDZ	✅	✅

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