subtracting a specific condition for each measure
问题 I have a data frame which looks like following and it continues up to subject 22 Beta is the dependent measure. Subject ROI Block Condition Beta 1 motor1 1 nopred_noom -2.8653 1 motor1 1 pred_noom -2.9126 1 motor1 1 nopred_om -2.8688 1 motor1 1 pred_om -2.9098 1 motor1 1 null -2.7717 1 motor1 2 nopred_noom -2.2382 1 motor1 2 pred_noom -2.0583 1 motor1 2 nopred_om -2.2207 1 motor1 2 pred_om -2.1928 1 motor1 2 null -2.1166 1 motor1 3 nopred_noom -1.5992 1 motor1 3 pred_noom -1.5493 1 motor1 3