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This function plots a cross-section of a circular pipe, shaded as filled to the level indicated by the depth and diameter values passed to it.
xc_circle(y = NULL, d = NULL)
water depth
pipe diameter
a cross-section diagram
# NOT RUN { # Draw a cross-section with diameter 1.0 and depth 0.7 xc_circle(y = 0.7, d = 1.0) # }
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