Merge pull request #372 from eric-wieser/don't-round-markers

Do not round marker sizes

Author: nschloe

test/test_marker.py

@@ -11,7 +11,7 @@ def plot():
         s = np.sin(t)
         c = np.cos(t)
         s2 = np.sin(2 * t)
-        ax.plot(t, s, "ko-", mec="r", markevery=2)
+        ax.plot(t, s, "ko-", mec="r", markevery=2, markersize=3)
         ax.plot(t, c, "ks--", mec="r", markevery=3)
         ax.scatter(t, s2, s=100, c="black", marker="+")
         ax.set_xlim(t[0], t[-1])

test/test_marker_reference.tex

@@ -30,7 +30,7 @@
 5.6548668 -0.95105652
 6.2831853 -4.8985872e-16
 };
-\addplot [semithick, black, mark=*, mark size=3, mark repeat=2, mark options={solid,draw=red}]
+\addplot [semithick, black, mark=*, mark size=1.5, mark repeat=2, mark options={solid,draw=red}]
 table {%
 0 0
 0.62831853 0.58778525

tikzplotlib/_line2d.py

@@ -140,12 +140,10 @@ def _marker(
 
     mark_size = obj.get_markersize()
     if mark_size:
+        ff = data["float format"]
         # setting half size because pgfplots counts the radius/half-width
-        pgf_size = int(0.5 * mark_size)
-        # make sure we didn't round off to zero by accident
-        if pgf_size == 0 and mark_size != 0:
-            pgf_size = 1
-        addplot_options.append(f"mark size={pgf_size:d}")
+        pgf_size = 0.5 * mark_size
+        addplot_options.append(f"mark size={pgf_size:{ff[2:-1]}}")
 
     mark_every = obj.get_markevery()
     if mark_every: