topic Arccos in Field Calculator in Data Management Questions https://community.esri.com/t5/data-management-questions/arccos-in-field-calculator/m-p/304040#M17388 <HTML><HEAD></HEAD><BODY><P>Hi, I need to calculate this formula in Field Calculator. Should be pretty easy, but I´ve never worked in Python. So I will be very grateful if someone could me write the input. Thanks a lot! Jan</P><P></P><P><STRONG>arccos ( (<SPAN style="color: #545454; background-color: #ffffff; font-size: small;"><SPAN style="font-size: small;">[Field_A</SPAN><SPAN style="font-size: small;">]^2 +&nbsp;[Field_B<SPAN style="font-size: small;">]^2 -<SPAN style="background-color: #ffffff;">&nbsp;</SPAN><SPAN style="font-size: small;">[Field_C</SPAN><SPAN style="font-size: small;">]^2) / (2*[Field_A<SPAN style="font-size: small;">]*[Field_B<SPAN style="font-size: small;">]) )</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></STRONG></P><P></P><P><SPAN style="background-color: #ffffff; color: #545454; font-size: small;">&nbsp;</SPAN></P><P></P><P><SPAN style="background-color: #ffffff; color: #545454; font-size: small;">&nbsp;&nbsp;</SPAN></P></BODY></HTML> Fri, 26 Jan 2018 20:57:51 GMT JanTichy 2018-01-26T20:57:51Z Arccos in Field Calculator https://community.esri.com/t5/data-management-questions/arccos-in-field-calculator/m-p/304040#M17388 <HTML><HEAD></HEAD><BODY><P>Hi, I need to calculate this formula in Field Calculator. Should be pretty easy, but I´ve never worked in Python. So I will be very grateful if someone could me write the input. Thanks a lot! Jan</P><P></P><P><STRONG>arccos ( (<SPAN style="color: #545454; background-color: #ffffff; font-size: small;"><SPAN style="font-size: small;">[Field_A</SPAN><SPAN style="font-size: small;">]^2 +&nbsp;[Field_B<SPAN style="font-size: small;">]^2 -<SPAN style="background-color: #ffffff;">&nbsp;</SPAN><SPAN style="font-size: small;">[Field_C</SPAN><SPAN style="font-size: small;">]^2) / (2*[Field_A<SPAN style="font-size: small;">]*[Field_B<SPAN style="font-size: small;">]) )</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></STRONG></P><P></P><P><SPAN style="background-color: #ffffff; color: #545454; font-size: small;">&nbsp;</SPAN></P><P></P><P><SPAN style="background-color: #ffffff; color: #545454; font-size: small;">&nbsp;&nbsp;</SPAN></P></BODY></HTML> Fri, 26 Jan 2018 20:57:51 GMT https://community.esri.com/t5/data-management-questions/arccos-in-field-calculator/m-p/304040#M17388 JanTichy 2018-01-26T20:57:51Z Re: Arccos in Field Calculator https://community.esri.com/t5/data-management-questions/arccos-in-field-calculator/m-p/304041#M17389 <HTML><HEAD></HEAD><BODY><PRE class="lia-code-sample line-numbers language-none"><CODE>math<SPAN class="punctuation token">.</SPAN>acos<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>!Field_A!<SPAN class="operator token">**</SPAN><SPAN class="number token">2</SPAN> <SPAN class="operator token">+</SPAN> !Field_B!<SPAN class="operator token">**</SPAN><SPAN class="number token">2</SPAN> <SPAN class="operator token">-</SPAN> !Field_C!<SPAN class="operator token">**</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">/</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> !Field_A! <SPAN class="operator token">*</SPAN> !Field_B!<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="comment token"># --- python parser... I think 'math' is builtin to the field calculator</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN></CODE></PRE></BODY></HTML> Sat, 11 Dec 2021 14:34:00 GMT https://community.esri.com/t5/data-management-questions/arccos-in-field-calculator/m-p/304041#M17389 DanPatterson_Retired 2021-12-11T14:34:00Z