前の行の値に基づいてフィールドを自動的に計算する必要があります

Question

<\/HEAD>すべての前の行の合計が450より大きく500未満になったときに、次の行が0または前の行を500以上にした残高からカウントを開始するように、前の行の値に基づいてフィールドを自動的に計算する必要があります。私は自分の数式を含めることができましたが、それは単一の行内で機能します。すなわち (${No of Persons in Sampled Building} + ${Estimated No of Persons in Residential Building}) の出力は、Estimated Population と呼ばれるフィールドの値になります <\/P><\/BODY><\/HTML>

eric3918esridot · Answer

Olaniyan,

I want to make sure I understand your question.  You have a survey question (field/column) and you want to automatically calculate the value of that column based on the answers of previously submitted surveys (rows)?  To my knowledge Survey 123 does not support reaching back into the feature service to pull out previous surveys and sum the values of a field.  This is due to the fact that Survey123 is working in an offline state storing the surveys until you upload the results.

I can reach back into previous questions in the current survey.  So if your survey has three questions, Number of persons sampled building , and number of persons in residential building I can sum those values and pre-populate the third question called estimated population and hide it from  the survey.

So my question to you are you trying to do this the first way or the second way.  To do this the second way,  refer to this link which explains how to create a calculation from previous questions using the XLSforms Calculation Column... Survey123 for ArcGIS support for XLSForm