This is more a comment that an answer but too long for a comment.
If you put \listfiles
before your code, in your log you'll see the package versions packages you're using.
On ShareLaTeX your MWE doesn't work, they have this package versions:
*File List*
standalone.cls 2015/07/15 v1.2 Class to compile TeX sub-files standalone
ifluatex.sty 2016/05/16 v1.4 Provides the ifluatex switch (HO)
ifpdf.sty 2016/05/14 v3.1 Provides the ifpdf switch
ifxetex.sty 2010/09/12 v0.6 Provides ifxetex conditional
xkeyval.sty 2014/12/03 v2.7a package option processing (HA)
xkeyval.tex 2014/12/03 v2.7a key=value parser (HA)
standalone.cfg 2015/07/15 v1.2 Default configuration file for 'standalone' c
lass
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
tikz.sty 2015/08/07 v3.0.1a (rcs-revision 1.151)
pgf.sty 2015/08/07 v3.0.1a (rcs-revision 1.15)
pgfrcs.sty 2015/08/07 v3.0.1a (rcs-revision 1.31)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfcore.sty 2010/04/11 v3.0.1a (rcs-revision 1.7)
graphicx.sty 2014/10/28 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
graphics.sty 2016/10/09 v1.0u Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2016/06/04 v1.11 sample graphics configuration
pdftex.def 2017/01/12 v0.06k Graphics/color for pdfTeX
infwarerr.sty 2016/05/16 v1.4 Providing info/warning/error messages (HO)
ltxcmds.sty 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
pgfsys.sty 2014/07/09 v3.0.1a (rcs-revision 1.48)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2013/09/09 (rcs-revision 1.9)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2016/05/11 v2.12 LaTeX color extensions (UK)
color.cfg 2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
pgfcomp-version-0-65.sty 2007/07/03 v3.0.1a (rcs-revision 1.7)
pgfcomp-version-1-18.sty 2007/07/23 v3.0.1a (rcs-revision 1.1)
pgffor.sty 2013/12/13 v3.0.1a (rcs-revision 1.25)
pgfkeys.sty
pgfkeys.code.tex
pgfmath.sty
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
pst-plot.sty 2011/04/13 package wrapper for pst-plot.tex (hv)
pstricks.sty 2015/11/14 v0.62 LaTeX wrapper for `PSTricks' (RN,HV)
pstricks.tex 2016/12/23 v2.71 `PSTricks' (tvz,hv)
pst-xkey.tex 2005/11/25 v1.6 PSTricks specialization of xkeyval (HA)
pst-fp.tex 2016/12/23 v2.71 `PST-fp' (hv)
pst-xkey.sty 2005/11/25 v1.6 package wrapper for pst-xkey.tex (HA)
multido.sty 2004/05/17 package wrapper for PSTricks `multido.tex', (HV/RN)
multido.tex 2010/05/14 v1.42 `multido' (tvz,hv)
pst-plot.tex 2017/01/18 1.76 `pst-plot' (tvz,hv)
supp-pdf.mkii
pdftexcmds.sty 2016/05/21 v0.22 Utility functions of pdfTeX for LuaTeX (HO)
epstopdf-base.sty 2016/05/15 v2.6 Base part for package epstopdf
grfext.sty 2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty 2016/05/16 v1.4 Define keys (HO)
kvoptions.sty 2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty 2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
***********
I have an updated TeX Live 2016, if I run your MWE, it works, with these package
versions:
*File List*
standalone.cls 2015/07/15 v1.2 Class to compile TeX sub-files standalone
ifluatex.sty 2016/05/16 v1.4 Provides the ifluatex switch (HO)
ifpdf.sty 2017/03/15 v3.2 Provides the ifpdf switch
ifxetex.sty 2010/09/12 v0.6 Provides ifxetex conditional
xkeyval.sty 2014/12/03 v2.7a package option processing (HA)
xkeyval.tex 2014/12/03 v2.7a key=value parser (HA)
standalone.cfg 2015/07/15 v1.2 Default configuration file for 'standalone' c
lass
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
tikz.sty 2015/08/07 v3.0.1a (rcs-revision 1.151)
pgf.sty 2015/08/07 v3.0.1a (rcs-revision 1.15)
pgfrcs.sty 2015/08/07 v3.0.1a (rcs-revision 1.31)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfcore.sty 2010/04/11 v3.0.1a (rcs-revision 1.7)
graphicx.sty 2014/10/28 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
graphics.sty 2016/10/09 v1.0u Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2016/06/04 v1.11 sample graphics configuration
pdftex.def 2017/01/12 v0.06k Graphics/color for pdfTeX
infwarerr.sty 2016/05/16 v1.4 Providing info/warning/error messages (HO)
ltxcmds.sty 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
pgfsys.sty 2014/07/09 v3.0.1a (rcs-revision 1.48)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2013/09/09 (rcs-revision 1.9)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2016/05/11 v2.12 LaTeX color extensions (UK)
color.cfg 2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
pgfcomp-version-0-65.sty 2007/07/03 v3.0.1a (rcs-revision 1.7)
pgfcomp-version-1-18.sty 2007/07/23 v3.0.1a (rcs-revision 1.1)
pgffor.sty 2013/12/13 v3.0.1a (rcs-revision 1.25)
pgfkeys.sty
pgfkeys.code.tex
pgfmath.sty
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
pst-plot.sty 2011/04/13 package wrapper for pst-plot.tex (hv)
pstricks.sty 2017/03/17 v0.63 LaTeX wrapper for `PSTricks' (RN,HV)
pstricks.tex 2017/04/06 v2.72 `PSTricks' (tvz,hv)
pst-xkey.tex 2005/11/25 v1.6 PSTricks specialization of xkeyval (HA)
pst-fp.tex 2017/04/06 v2.72 `PST-fp' (hv)
pst-xkey.sty 2005/11/25 v1.6 package wrapper for pst-xkey.tex (HA)
multido.sty 2004/05/17 package wrapper for PSTricks `multido.tex', (HV/RN)
multido.tex 2010/05/14 v1.42 `multido' (tvz,hv)
pst-plot.tex 2017/03/20 1.77 `pst-plot' (tvz,hv)
supp-pdf.mkii
pdftexcmds.sty 2017/03/19 v0.25 Utility functions of pdfTeX for LuaTeX (HO)
epstopdf-base.sty 2016/05/15 v2.6 Base part for package epstopdf
grfext.sty 2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty 2016/05/16 v1.4 Define keys (HO)
kvoptions.sty 2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty 2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
***********
As you can see, the pst-plot
versions differ:
pst-plot.tex 2017/03/20 1.77 `pst-plot' (tvz,hv) <-- mine
pst-plot.tex 2017/01/18 1.76 `pst-plot' (tvz,hv) <-- ShareLaTeX
You have to update your TeX distribution.