前一节还能正常显示，这一节做到10:30左右就显示错误了

Error: Invalid value for <g> attribute transform="translate(undefined,0)"d3.v3.js:669 attrFunctiond3.v3.js:961 (anonymous function)d3.v3.js:967 d3_selection_eachd3.v3.js:960 d3_selectionPrototype.eachd3.v3.js:651 d3_selectionPrototype.attrindex.js:33 (anonymous function)d3.v3.js:2010 (anonymous function)d3.v3.js:1995 (anonymous function)d3.v3.js:504 eventd3.v3.js:1948 respond

18postload.js:46 Error: Invalid value for <g> attribute transform="translate(undefined,0)"

12postload.js:45 Error: Invalid value for <g> attribute transform="translate(undefined,0)"