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An RPN Expression is an RRDtool Compatible RPN Expression. Syntax includes all functions below in addition to both Device and Data Query replacement expressions such as <span class="deviceUp">|query_ifSpeed|</span>. To use a Data Source in the RPN Expression, you must use the syntax: <span class="deviceUp">|ds:dsname|</span>. For example, <span class="deviceUp">|ds:traffic_in|</span> will get the current value of the traffic_in Data Source for the RRDfile(s) associated with the Graph. Any Data Source for a Graph can be included.<br><br>Math Operators: <span class="deviceUp">+, -, /, *, %, ^</span><br>Functions: <span class="deviceUp">SIN, COS, TAN, ATAN, SQRT, FLOOR, CEIL, DEG2RAD, RAD2DEG, ABS, EXP, LOG, ATAN, ADNAN</span><br>Flow Operators: <span class="deviceUp">UN, ISINF, IF, LT, LE, GT, GE, EQ, NE</span><br>Comparison Functions: <span class="deviceUp">MAX, MIN, INF, NEGINF, NAN, UNKN, COUNT, PREV</span>%s %s
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An RPN Expression is an RRDtool Compatible RPN Expression. Syntax includes all functions below in addition to both Device and Data Query replacement expressions such as <span style="color:blue;">|query_ifSpeed|</span>. To use a Data Source in the RPN Expression, you must use the syntax: <span style="color:blue;">|ds:dsname|</span>. For example, <span style="color:blue;">|ds:traffic_in|</span> will get the current value of the traffic_in Data Source for the RRDfile(s) associated with the Graph. Any Data Source for a Graph can be included.<br>Math Operators: <span style="color:blue;">+, -, /, *, %, ^</span><br>Functions: <span style="color:blue;">SIN, COS, TAN, ATAN, SQRT, FLOOR, CEIL, DEG2RAD, RAD2DEG, ABS, EXP, LOG, ATAN, ADNAN</span><br>Flow Operators: <span style="color:blue;">UN, ISINF, IF, LT, LE, GT, GE, EQ, NE</span><br>Comparison Functions: <span style="color:blue;">MAX, MIN, INF, NEGINF, NAN, UNKN, COUNT, PREV</span>%s %s
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