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rocketlaunchr / dataframe-go

DataFrames for Go: For statistics, machine-learning, and data manipulation/exploration
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It shouldn't print all the rows and columns as default #2

Closed vikram-rawat closed 5 years ago

vikram-rawat commented 6 years ago

Default should print only as much as console.

image

rocketlaunchr-cto commented 6 years ago

I'll eventually fix it up so it displays the first 3 and last 3 rows. Alternatively, you can provide a PR and replicate the String() function in the Series structs.

vikram-rawat commented 6 years ago

I am not a programmer and I am just learning Golang but I will try to help you out if possible. If there is something easy you want me to do I will surely do it.

I think this library needs

  1. Import from SQL
  2. Import from excel
  3. select columns
  4. Filter Rows
  5. Group By Values
  6. Basic functions like sum, mean etc....

Let me know if I can help in any of these. Best of Luck!!!

rocketlaunchr-cto commented 6 years ago

1. 2. I won't have time to implement import from SQL or Excel any time soon. That will require assistance from others.

3. What do you mean Select columns? The function NameToColumn(seriesName string) combined with the Series field can be used to select columns.

4. 5. These I will work on when I figure out the best API to do so.

6. This is doable.

bk521234 commented 5 years ago

I think this library needs

  1. Import from SQL
  2. Import from excel
  3. select columns
  4. Filter Rows
  5. Group By Values
  6. Basic functions like sum, mean etc....

I think these sounds like great ideas!

1. and 2. could be part of a longer term project road map. 4., 5., and 6. sound like great shorter term features to tackle.

can I help out anywhere @rocketlaunchr-cto ? we will have to break up large goals into manageable pieces..

rocketlaunchr-cto commented 5 years ago

@bk521234 How would you like to help. I can write up a document on what you can do.

bk521234 commented 5 years ago

i'd be willing to chip in some help to add a few features. a document could be really useful. maybe a wiki page with stuff? or small-ish projects for the near term?

I think the more functionality the package has, the more willing people will be to adopt/ use it

vikram-rawat commented 5 years ago

I am not a good programmer but I can help too. But If I get stuck somewhere I would want you to help me too... Start a slack channel or something where we could work.

rocketlaunchr-cto commented 5 years ago

@vikram-rawat @bk521234 Here are some tasks:

  1. For func (df *DataFrame) NRows() int, insert an optional bool parameter so enable/disable the read lock inside the function. The default should be to read lock.

  2. Fix up the func (df *DataFrame) String() string { function found in dataframe_fmt.go to show only the first 3 items, then ..., then the last 3 items, similar to how the Series.String() function behaves.

They are easy changes.

rocketlaunchr-cto commented 5 years ago

This has now been fixed. Print will only show max 6 rows as summary.