<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV>Hi </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>i try to make a windchill-chart. But it´s hard :-)</DIV><DIV>I have all needed parameters defined here in my script, but i got errors by doing things with the</DIV><DIV>grads math functions.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>----- snip </DIV><DIV>'define t3=TMP2m-273.16'</DIV><DIV>'define u10=UGRD10m'</DIV><DIV>'define v10=VGRD10m'</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>* // Windspeed in km/h = (m/s) *3.6</DIV><DIV>* // try with math_pow </DIV><DIV>* // wis = Windspeed in km/h (10m)</DIV><DIV>* // t2 = 13.12 + 0.6215 * T(2m) - 11.37* (wis)pot(0.16) + 0.3965 * T(2m)* (wis)pot(0.16)</DIV><DIV>*</DIV><DIV>'define wis = (mag(u10,v10)*3.6'</DIV><DIV>rc = math_pow(wis,0.16)</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>t2=13.12 + 0.6215*t3 - 11-37*rc + 0.3965*t3*rc</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>'set gxout contour'</DIV><DIV>'d t2'</DIV><DIV>....</DIV><DIV>--- snip -----------</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Error comes up doing math_pow with a data field - here with "wis". </DIV><DIV>If i use a fixed value instead of "wis" - math_pow is working, but this is not helping.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Anybody, any ideas. </DIV><DIV>It looks simple, but i cannot see the solution at the moment.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Regards and thank you</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Frank</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>Dipl. Met. Frank Bandle</DIV><DIV><A href="mailto:frank@bandle.com">frank@bandle.com</A> * FeMax Wetteragentur IT & Medienberatung </DIV><DIV>www.wetter365.net * <A href="http://www.femax.de">www.femax.de</A></DIV><DIV>ICQ/AIM: f2topcat *Skype: fraban </DIV><DIV>GnuPG/PGP Key-ID: 0x8B8BCC29</DIV><BR class="Apple-interchange-newline"></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN> </DIV><BR></BODY></HTML>