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How to highlight or color certain values in a list based on position.. For example x = {1,2,3,4,5,5,5,6}... I want to plot x and highlight values (Red) in a position such as {0,4,5} and others should be black. I want something like highlightedX={1,2,3,4,5,5,5,6}.. Thank you

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A straightforward solution is to use MapAt combined with Style. Given your data and a modified highlightpositions (lists in Wolfram are indexed 1 to n)

highlightPositions = {1, 5, 6};


MapAt[Style[#, FontColor -> Red] &, x, {#} & /@ highlightPositions]

enter image description here

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