ios - Core Plot graph bottom axis not visible -

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i've got core-plot line graph displaying follows (background view coloured red clarity):

enter image description here

i have 0 padding @ bottom, , have x-axis configured, labels. graph squeezed right down against bottom of view though. if increase bottom padding grey bar @ bottom same result.

what need change in order move graph bottom of view , display axis?

the code quite lengthy, here's excerpts:

    self->graph = [[cptxygraph alloc] initwithframe:hostview.bounds];     hostview.hostedgraph = graph;     self->graph.paddingleft = 0.0f;     self->graph.paddingtop = 10.0f;     self->graph.paddingright = 0.0f;     self->graph.paddingbottom = 0.0f;      ...      [plotspace scaletofitplots:[nsarray arraywithobjects:p1, p2, p3, nil]];     cptmutableplotrange *xrange = [plotspace.xrange mutablecopy];     [xrange expandrangebyfactor:cptdecimalfromcgfloat(1.1f)];     plotspace.xrange = xrange;     cptmutableplotrange *yrange = [cptplotrange plotrangewithlocation:cptdecimalfromfloat(0.0f) length:cptdecimalfromfloat(500.0f)];     plotspace.yrange = yrange;      ...      cptxyaxisset *axisset = (cptxyaxisset *) self->graph.axisset;     cptaxis *x = axisset.xaxis;     x.axislinestyle = axislinestyle;     x.labelingpolicy = cptaxislabelingpolicynone;     x.majorticklinestyle = axislinestyle;     x.majorticklength = 4.0f;     x.tickdirection = cptsignnegative;      ...      x.axislabels = xlabels;     x.majorticklocations = xlocations;

try adding bottom padding graph.plotareaframe.


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