Merge pull request #26484 from SamLubelsky/text-backend-plotting

sympy · Apr 23, 2024 · 74c56ac · 74c56ac
2 parents ab88a7d + 8757b88
commit 74c56ac
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diff --git a/sympy/plotting/tests/test_plot.py b/sympy/plotting/tests/test_plot.py
@@ -60,6 +60,10 @@ def save(self):
     def close(self):
         pass
 
+def test_basic_plotting_backend():
+    x = Symbol('x')
+    plot(x, (x, 0, 3), backend='text')
+    plot(x**2 + 1, (x, 0, 3), backend='text')
 
 @pytest.mark.parametrize("adaptive", [True, False])
 def test_plot_and_save_1(adaptive):

diff --git a/sympy/plotting/textplot.py b/sympy/plotting/textplot.py
@@ -50,6 +50,12 @@ def textplot_str(expr, a, b, W=55, H=21):
             .format(free))
     x = free.pop() if free else Dummy()
     f = lambdify([x], expr)
+    if isinstance(a, complex):
+        if a.imag == 0:
+            a = a.real
+    if isinstance(b, complex):
+        if b.imag == 0:
+            b = b.real
     a = float(a)
     b = float(b)