I think the proposed solution is already implemented, as we've already explained the meaning of the crying emoji in the cheat sheet:

Some I'm leaning towards closing this issue for the moment.

I think that there is another issue where it was discussed to update this map. When it happens, I would be willing to think of a better graphic cues.

@glemaitre, it might be #30076.

It would be slightly nicer if the chart is kind of stand-alone, rather than needing legend explaining what the emoticon means ...

What about using "Try next" instead of the emoticon? I had a quick go at it on draw.io. I opened #30347. The advantage of "Try next" is that it is shorter than "Not working" and as things currently stands spacing is a bit limited to make the label fit inside the arrow.

See the svg version.

I am guessing that the emoticon 😭 was used to be compact but maybe @Charlie-XIAO or @adrinjalali remembers more? For this to fit, I had to move boxes around a bit.

Side-comment: orange "try next" arrow generally means here is another estimator you can try, but sometimes means a special case.:

• "you have text data"
• "you have more than 10k samples"

I guess the latter can be dealt with separately.

I think that there is another issue where it was discussed to update this map

@glemaitre, it might be #30076.

@virchan just FYI, I think @glemaitre has in mind a general update of the map (I don't think there is an issue for this yet, actually I found #7686 after a more thorough search), for example it does not mention some estimators we would recommend today like HistGradientBoostingRegressor/Classifier or LogisticRegression and some other estimators would likely be mentioned less or not at all (candidates are SVM, ElasticNet, probably more ...). This requires getting consensus and finding the right tradeoffs between information accuracy and keeping it simple for the user. As such, it is probably not going to happen overnight.

For some more background, users and teachers mostly love this map, maintainers generally think this is somewhat too simplistic, which is part of the reason it hasn't been updated much since it was created probably more than 10 years ago.

Indeed - I used the emoji because "Not working" did not fit in. I agree that having explicit text is better (I think many people won't even notice there's a legend) - "TRY NEXT", or maybe "NOT WORK"? We could also make the text more compact by not using bold font and not capitalizing the letters, etc.

Glad you like it, thanks for your feed-back @clementinodemendonca!