How can I merge multiple matrices of different dimensions in R -

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this question has answer here:

i have these matrices of different dimensions. key.related.sheet column in matrices have common , uniques values. want match common rows , merge 3 matrices, want include unique rows well. result column should have key.related.sheet, sample_b , trace_1,trace_2 , trace_3 columns only. can please me this?

aa<-structure(c("s05-f13-p01:s05-f13-p01", "s05-f13-p01:s08-f10-p01",  "s05-f13-p01:s08-f11-p01", "s05-f13-p01:s09-f66-p01", "s05-f13-p01",  "s08-f10-p01", "s08-f11-p01", "s09-f66-p01", "1.25", "0.227",  "-0.183", "-0.217"), .dim = c(4l, 3l), .dimnames = list(null,      c("key.related.sheet", "sample_b", "trace_1")))  bb<-structure(c("s05-f13-p01:s08-f10-p01", "s05-f13-p01:s08-f11-p01",  "s05-f13-p01:s09-f66-p01", "s05-f13-p01:s09-f67-p01", "s08-f10-p01",  "s08-f11-p01", "s09-f66-p01", "s09-f67-p01", "0.227", "-0.183",  "-0.217", "0.292", "unknown", "unknown", "unknown", "unknown" ), .dim = c(4l, 4l), .dimnames = list(null, c("key.related.sheet",  "sample_b", "trace_2", "type")))  cc<-structure(c("s05-f13-p01:s08-f11-p01", "s05-f13-p01:s09-f66-p01",  "s05-f13-p01:s09-f67-p01", "s05-f13-p01:s09-f68-p01", "s05-f13-p01:s09-f01-p01",  "s08-f11-p01", "s09-f66-p01", "s09-f67-p01", "s09-f68-p01", "s09-f01-p01",  "-0.183", "-0.217", "0.292", "-0.314", "0.0418"), .dim = c(5l,  3l), .dimnames = list(null, c("key.related.sheet", "sample_b",  "trace_3")))

the expected output be:

   key.related.sheet         sample_b      trace_1   trace_2    trace_3  "s05-f13-p01:s05-f13-p01" "s05-f13-p01" "1.25"    "s05-f13-p01:s08-f10-p01" "s08-f10-p01" "0.227"      "0.227"  "s05-f13-p01:s08-f11-p01" "s08-f11-p01" "-0.183"     "-0.183"    "-0.183"     "s05-f13-p01:s09-f66-p01" "s09-f66-p01" "-0.217"     "-0.217"    "-0.217"  "s05-f13-p01:s09-f67-p01" "s09-f67-p01"              "0.292"     "0.292"  "s05-f13-p01:s09-f68-p01" "s09-f68-p01"                          "-0.314"  "s05-f13-p01:s09-f01-p01" "s09-f01-p01"                          "0.0418"

two nested merges , removal of extraneous column

merge(merge(aa,bb[, -4], by=c("key.related.sheet", "sample_b") ,all=true),        cc,  by=c("key.related.sheet", "sample_b") ,all=true)          key.related.sheet    sample_b trace_1 trace_2 trace_3 1 s05-f13-p01:s05-f13-p01 s05-f13-p01    1.25    <na>    <na> 2 s05-f13-p01:s08-f10-p01 s08-f10-p01   0.227   0.227    <na> 3 s05-f13-p01:s08-f11-p01 s08-f11-p01  -0.183  -0.183  -0.183 4 s05-f13-p01:s09-f66-p01 s09-f66-p01  -0.217  -0.217  -0.217 5 s05-f13-p01:s09-f67-p01 s09-f67-p01    <na>   0.292   0.292 6 s05-f13-p01:s09-f01-p01 s09-f01-p01    <na>    <na>  0.0418 7 s05-f13-p01:s09-f68-p01 s09-f68-p01    <na>    <na>  -0.314

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