# RELEASE NOTES

## spatstat 1.56-1

### 27 July 2018

   We thank Agustin Lobo for contributions.

### OVERVIEW

 * Improvements to infrastructure.

 * Bug fixes.

 * Version nickname: "Invisible Friend"

### NEW FUNCTIONS

 * as.im.expression  
    New method for 'as.im' for expressions.

 * flipxy.tess  
    Method for 'flipxy' for tessellations.

### SIGNIFICANT USER-VISIBLE CHANGES

 * sdr  
    This is now a generic function, with a method for class 'ppp'.

 * pointsOnLines  
    The result now has an attribute named "map"  
    which maps each point to its parent line segment.

 * summary.lpp  
    Improved output.

 * intersect.owin  
    Argument 'fatal' now defaults to FALSE.

 * quadrature schemes (class "quad" and "logiquad")  
    Improved print and summary methods.

### BUG FIXES

 1. cut.lpp  
     Crashed if the marks were a data frame or hyperframe.  
     Fixed.

 2. summary.lpp, print.summary.lpp  
     Output was garbled if the marks were a data frame or hyperframe.  
     Fixed.

 3. integral.linim  
     Crashed if the function had NA values.  
     Fixed.

 4. Tstat  
     Crashed if ratio=TRUE.  
     Fixed.

 5. intersect.owin  
     Ignored argument 'fatal' in some cases.  
     [Spotted by Agustin Lobo.]  
     Fixed.

 6. plot.tess  
     Crashed if do.col=TRUE and 'values' was a factor.  
     Fixed.

 7. pcf.ppp  
     Crashed if 'domain' was given and ratio=TRUE.  
     Fixed.

 8. "[<-.sparse3Darray"  
     Crashed if 'value' was one-dimensional  
     and the indices i, j, k specified a two-dimensional subset of x.  
     Fixed.

 9. plot.quad  
     Crashed if tiles=TRUE for a quadrature scheme  
     created by quadscheme(method="dirichlet", exact=TRUE).  
     Fixed.

10. bugtable  
     Crashed if there were no bugs!  
     Fixed.

11. sparse array code  
     An array bounds violation (segmentation fault) could occur.  
     Fixed.

12. internal code  
     Numerous internal bugs have been fixed.