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vcd2df  

Value Change Dump to Data Frame
View on CRAN: Click here


Download and install vcd2df package within the R console
Install from CRAN:
install.packages("vcd2df")

Install from Github:
library("remotes")
install_github("cran/vcd2df")

Install by package version:
library("remotes")
install_version("vcd2df", "1.0.1")



Attach the package and use:
library("vcd2df")
Maintained by
Calvin Deutschbein
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2025-05-16
Latest Update: 2025-05-16
Description:
Provides the 'vcd2df' function, which loads a IEEE 1364-1995/2001 VCD (.vcd) file, specified as a parameter of type string containing exactly a file path, and returns an R dataframe containing values over time. A VCD file captures the register values at discrete timepoints from a simulated trace of execution of a hardware design in Verilog or VHDL. The returned dataframe contains a row for each register, by name, and a column for each time point, specified VCD-style using octothorpe-prefixed multiples of the timescale as strings. The only non-trivial implementation details are that (1) VCD 'x' and 'z' non-numerical values are encoded as negative value -1 (as otherwise all bit values are positive) and (2) registers with repeated names in distinct modules are ignored, rather than duplicated, as we anticipate these registers to have the same values. Read more in arXiv preprint: 'vcd2df' – Leveraging Data Science Insights for Hardware Security Research <doi:10.48550/arXiv.2505.06470>.
How to cite:
Calvin Deutschbein (2025). vcd2df: Value Change Dump to Data Frame. R package version 1.0.1, https://cran.r-project.org/web/packages/vcd2df. Accessed 12 Sep. 2026.
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