R Under development (unstable) (2023-11-25 r85635 ucrt) -- "Unsuffered Consequences"
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> library(RCytoGPS)
> ## simulate data
> set.seed(53106)
> CL <- RCytoGPS:::cytobandLocations
> fake <- as.data.frame(matrix(runif(nrow(CL) * 10), ncol = 10))
> fake$PV <- runif(nrow(fake), 0, 1)
> CL <- cbind(CL, fake) # extra colnames V1, ..., V10
> CD <- CytobandData(CL)
> 
> ## clipping
> image(CD, 7, list("V1", "V2"))
> image(CD, 7, list("V1", "V2"), clip = TRUE)
> 
> RCytoGPS:::plot2Chrom(CD@DATA, "V1", "V2", chr = 7, horiz = TRUE, clip = TRUE)
> RCytoGPS:::plot2Chrom(CD@DATA, "V1", "V2", chr = 7, horiz = FALSE, clip = TRUE)
> image(Chromosome(7, maxbase = 1.6e8), horiz = TRUE)
> 
> proc.time()
   user  system elapsed 
   0.54    0.09    0.64