Next: Geographical linear projection Up: Non-map Projections Previous: Logarithmic projection

##
Power projection

Figure 5.3: Exponential or power transformation of x-coordinates

This projection allows us to display xa versus yb. While a and b can be any values, we will select a = 0.5 and b = 1 which means we will plot y versus . We indicate this scaling by appending a p (lower case P) followed by the desired exponent, in our case 0.5. Since b = 1 we do not need to specify p1 since it is identical to the linear scaling. Thus our command becomes

    psxy -R0/100/0/10 -Jx0.3ip0.5/0.15i -Ba1p/a2f1WSne -W1p -P -K sqrt.d >! GMT_pow.ps
    psxy -R -Jx -Sc0.075i -G255 -W -O sqrt.d10 >> GMT_pow.ps