Fraction of galaxies in filaments for different spectroscopic-only, photometric-only, and mixed samples. The samples are ordered so that the y-axis values of photometric-only and mixed samples are in increasing order. The spectroscopic-only samples are used for reference values to show the increase in the fraction of galaxies in filaments for mixed samples. The sample s30 is the smallest spectroscopic sample in this study because smaller samples had too few galaxies to be able to detect the filamentary network.