Reference the row number in a function???

Quantopian's community platform is shutting down. Please read this post for more information and download your code.

Back to Community

Reference the row number in a function???

edited Aug 2, 2016

OMG!!! How do you return the row number in a DF???

For instance, all values in row one would be 1, all values in row two would be 2, all values in row 3 would be 3... without manually changing the values? You would think there would be a function like row() or row_number()

It is nowhere in the documentation!!!

ALSO!!! How exactly are you supposed to use data.current and data.history if they will only take a sid that is entered directly. They will not accept anything that comes from a dataFrame. So if you don't know exactly which stock you want to trade and you want to screen for them, then forget it.

Show me ONE example source code that actually orders a stock WITHOUT entering a single sid.

2 responses

I agree, the pandas.DataFrame API is unpleasantly complex and obscure. You want to learn about .ix and .loc. The documentation is worth a read too, but it's a bloody novel.

Ok, just found out that there is no information stored for the row such as it's position. That's not to say that you can't find the row position with a particular entry/value/index as with .iloc, .loc., .at, ect. The row is not an object itself. Anyways, this was a work around to another problem that has been solved by much simpler means. Thanks.

You've successfully submitted a support ticket.

Our support team will be in touch soon.

Need help? Contact support.

The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.

About Quantopian

The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.