Fix iplot error lpdid (#754)

* fix error when calling iplot twice * update changelog
py-econometrics · Dec 18, 2024 · 4c59151 · 4c59151
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diff --git a/docs/changelog.qmd b/docs/changelog.qmd
@@ -1,5 +1,9 @@
 # Changelog
 
+## PyFixest 0.28.0 (In Development, can be installed from github)
+
+- Fix a bug that caused reindexing of `LPDID._coeftable` when calling `LPDID.iplot()`. As a result, a second call of `LPDID.iplot()` would fail.
+
 ## PyFixest 0.27.0
 
 - Adds support for Gelbach's (JoLe 2016) Regression Decomposition method using a `decompose()` method for `Feols`.

diff --git a/pyfixest/did/lpdid.py b/pyfixest/did/lpdid.py
@@ -172,7 +172,7 @@ def iplot(
         lets-plot figure
             A lets-plot figure with coefficient estimates and confidence intervals.
         """
-        df = self._coeftable
+        df = self._coeftable.copy()
         df["fml"] = "lpdid"
 
         return _coefplot(