56Fe/V1-V4-LFPs-and-Visual-Attention: Data and code for: Ferro, D., van Kempen, J., Boyd, M., Panzeri, S. and Thiele, A., 2021. Directed information exchange between cortical layers in macaque V1 and V4 and its modulation by selective attention. Proceedings of the National Academy of Sciences, 118(12), p.e2022097118. Data contain laminar local field potentials in V1 and V4. Code runs spectral power, coherence and Conditional Granger Causality (cGC) based on Mutual Information for interactions between and within V1-V4 laminar depths. DOI