Thanks, but the structure is not so simple and I'm not sure which are the parts that are required by the function to create the plot

 Formal class 'QDNAseqReadCounts' [package "QDNAseq"] with 7 slots
  ..@ assayData        :<environment: 0xdfe51e0> 
  ..@ phenoData        :Formal class 'AnnotatedDataFrame' [package "Biobase"] with 4 slots
  .. .. ..@ varMetadata      :'data.frame': 4 obs. of  1 variable:
  .. .. .. ..$ labelDescription: chr [1:4] NA NA NA NA
  .. .. ..@ data             :'data.frame': 73 obs. of  4 variables:
  .. .. .. ..$ name             : chr [1:73] "p001ii_.R1.fq.gz.sam.sorted" "p003jj_.R1.fq.gz.sam.sorted" "p006kk_.R1.fq.gz.sam.sorted" "p006r_.R1.fq.gz.sam.sorted" ...
  .. .. .. ..$ total.reads      : num [1:73] 6464628 5090209 5414391 6216836 3868858 ...
  .. .. .. ..$ used.reads       : num [1:73] 6117916 4809392 5117151 5876539 3661384 ...
  .. .. .. ..$ expected.variance: num [1:73] 0.00441 0.00562 0.00528 0.0046 0.00738 ...
  .. .. ..@ dimLabels        : chr [1:2] "sampleNames" "sampleColumns"
  .. .. ..@ .__classVersion__:Formal class 'Versions' [package "Biobase"] with 1 slot
  .. .. .. .. ..@ .Data:List of 1
  .. .. .. .. .. ..$ : int [1:3] 1 1 0
  ..@ featureData      :Formal class 'AnnotatedDataFrame' [package "Biobase"] with 4 slots
  .. .. ..@ varMetadata      :'data.frame': 9 obs. of  1 variable:
  .. .. .. ..$ labelDescription: chr [1:9] "Chromosome name" "Base pair start position" "Base pair end position" "Percentage of non-N nucleotides (of full bin size)" ...
  .. .. ..@ data             :'data.frame': 30970 obs. of  9 variables:
  .. .. .. ..$ chromosome : chr [1:30970] "1" "1" "1" "1" ...
  .. .. .. ..$ start      : num [1:30970] 1e+00 1e+05 2e+05 3e+05 4e+05 ...
  .. .. .. ..$ end        : num [1:30970] 1e+05 2e+05 3e+05 4e+05 5e+05 6e+05 7e+05 8e+05 9e+05 1e+06 ...
  .. .. .. ..$ bases      : num [1:30970] 90 77.4 40.3 82.3 71.4 ...
  .. .. .. ..$ gc         : num [1:30970] 42.5 43.6 39.1 40.2 45.4 ...
  .. .. .. ..$ mappability: num [1:30970] 22.14 7.56 9.17 9 11.77 ...
  .. .. .. ..$ blacklist  : num [1:30970] 0.979 0 0 0 0 ...
  .. .. .. ..$ residual   : num [1:30970] NA NA NA NA NA ...
  .. .. .. ..$ use        : logi [1:30970] TRUE TRUE TRUE TRUE TRUE TRUE ...
  .. .. ..@ dimLabels        : chr [1:2] "featureNames" "featureColumns"
  .. .. ..@ .__classVersion__:Formal class 'Versions' [package "Biobase"] with 1 slot
  .. .. .. .. ..@ .Data:List of 1
  .. .. .. .. .. ..$ : int [1:3] 1 1 0
  ..@ experimentData   :Formal class 'MIAME' [package "Biobase"] with 13 slots
  .. .. ..@ name             : chr ""
  .. .. ..@ lab              : chr ""
  .. .. ..@ contact          : chr ""
  .. .. ..@ title            : chr ""
  .. .. ..@ abstract         : chr ""
  .. .. ..@ url              : chr ""
  .. .. ..@ pubMedIds        : chr ""
  .. .. ..@ samples          : list()
  .. .. ..@ hybridizations   : list()
  .. .. ..@ normControls     : list()
  .. .. ..@ preprocessing    : list()
  .. .. ..@ other            : list()
  .. .. ..@ .__classVersion__:Formal class 'Versions' [package "Biobase"] with 1 slot
  .. .. .. .. ..@ .Data:List of 2
  .. .. .. .. .. ..$ : int [1:3] 1 0 0
  .. .. .. .. .. ..$ : int [1:3] 1 1 0
  ..@ annotation       : chr(0) 
  ..@ protocolData     :Formal class 'AnnotatedDataFrame' [package "Biobase"] with 4 slots
  .. .. ..@ varMetadata      :'data.frame': 0 obs. of  1 variable:
  .. .. .. ..$ labelDescription: chr(0) 
  .. .. ..@ data             :'data.frame': 73 obs. of  0 variables
  .. .. ..@ dimLabels        : chr [1:2] "sampleNames" "sampleColumns"
  .. .. ..@ .__classVersion__:Formal class 'Versions' [package "Biobase"] with 1 slot
  .. .. .. .. ..@ .Data:List of 1
  .. .. .. .. .. ..$ : int [1:3] 1 1 0
  ..@ .__classVersion__:Formal class 'Versions' [package "Biobase"] with 1 slot
  .. .. ..@ .Data:List of 4
  .. .. .. ..$ : int [1:3] 3 3 1
  .. .. .. ..$ : int [1:3] 2 34 0
  .. .. .. ..$ : int [1:3] 1 3 0
  .. .. .. ..$ : int [1:3] 1 10 0