装了meta包和metafor包之后,未运行代码就出现这些红字,是什么原因吗
Error in substring(html, match + 6, match + attr(match, "match.length") - :
invalid multibyte string at '<a2><<2f>i> denote the observed value of the effect size or outcome measure in the ith study. Let θ岬<a2> denote the corresponding (unknown) true effect or outcome, such that </p>
y岬<a2> | θ岬<a2> ~ N(θ岬<a2>, v岬<a2>).
In other words, the observed effects or outcomes are assumed to be unbiased and normally distributed estimates of the corresponding true effects or outcomes with sampling variances equal to v岬<a2>. The v岬<a2> values are assumed to be known. Depending on the outcome measure used, a bias correction, normalizing, and/or variance stabilizing transformation may be necessary to ensure that these assumptions are (approximately) true (e.g., the log transformation for odds ratios, the bias correction for standardized mean differences, Fisher's r-to-z transformation for correlations; see <a href="../../metafor/help/escalc">escalc</a>
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