Another way to approach the linear combination is to look at it geometrically. This is where the idea of barycentric coordinates can help. A barycentric coordinate system describes the location of a point as the weighted sum of the regular coordinates of the vertices forming a simplex. In other words, it describes a linear combination with respect to a set of points, where in -dimensional space.
2025年，上证指数全年累计上涨18.41%，创最近6年来最大年度涨幅，创最近6年以来新高，上证指数最终报收3968.84点，深证成指全年上涨29.87%，创业板指全年上涨49.57%。北证50、科创综指年线分别上涨39.78%和46.30%。沪深300指数累计上涨17.66%。
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