unstack table with pre and post measurements

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Anna Pisz
Anna Pisz on 14 Jun 2022
Answered: Peter Perkins on 16 Jun 2022
Hello,
I would like to orginize table so I have ie JumpHeight_pre, JumpHeight_post_1 etc.
I try to use unstack function
D=unstack(JH,["Name","UnweightingPhase","BrakingPhase","PropulsivePhase","RelativePropulsiveNetImpulse","SystemWeight","JumpHeight","JumpMomentum","CountermovementDepth","BrakingRFD","Stiffness","ForceAtMinDisplacement","Avg_BrakingForce","Avg_RelativeBrakingForce","PeakBrakingForce","PeakRelativeBrakingForce","Avg_PropulsiveForce","Avg_RelativePropulsiveForce","PeakPropulsiveForce","PeakRelativePropulsiveForce","UnweightingPhase","UnweightingPhase","BrakingPhase","BrakingPhase","PropulsivePhase","PropulsivePhase","FlightTime","TimeToTakeoff","BrakingNetImpulse","PropulsiveNetImpulse","PositiveImpulse","PositiveNetImpulse","ImpulseRatio","Avg_BrakingVelocity","PeakBrakingVelocity","Avg_PropulsiveVelocity","TakeoffVelocity","PeakVelocity","Avg_BrakingPower","Avg_RelativeBrakingPower","PeakBrakingPower","PeakRelativeBrakingPower","Avg_PropulsivePower","Avg_RelativePropulsivePower","PeakRelativePropulsivePower","PeakPropulsivePower","L_RPeakBrakingForce","LeftForceAtPeakBrakingForce","RightForceAtPeakBrakingForce","L_RAvg_BrakingForce","LeftAvg_BrakingForce","RightAvg_BrakingForce","L_RPeakPropulsiveForce","LeftForceAtPeakPropulsiveForce","RightForceAtPeakPropulsiveForce","L_RAvg_PropulsiveForce","LeftAvg_PropulsiveForce","RightAvg_PropulsiveForce","L_RAvg_BrakingRFD","LeftAvg_BrakingRFD","RightAvg_BrakingRFD","L_RBrakingImpulseIndex","L_RPropulsiveImpulseIndex","TimeToStabilization","LandingStiffness","PeakLandingForce","Avg_LandingForce","RelativePeakLandingForce","L_RPeakLandingForce","LeftForceAtPeakLandingForce","RightForceAtPeakLandingForce","L_RAvg_LandingForce","LeftAvg_LandingForce","RightAvg_LandingForce","L_RLandingImpulseIndex","RSI","mRSI","BrakingImpulse","RelativeBrakingImpulse","RelativeBrakingNetImpulse","PropulsiveImpulse","RelativePropulsiveImpulse"],'Phase')
however I recived table with a lot of missing values
I am not sure what to do to recieve immediately results in one row for one person.
Thank you for your help
  1 Comment
Peter Perkins
Peter Perkins on 14 Jun 2022
Anna, that command can't possibly be what you intend. You need to show a short example of what you are starting with, and what you want to end up with.

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Answers (2)

Anna Pisz
Anna Pisz on 15 Jun 2022
This is what I have
This is what I aim for.
I know that in R program function is call reshape and its aiming to change long data into wide... however I cannot make it in Matlab

Peter Perkins
Peter Perkins on 16 Jun 2022
unstack needs you to tell it three things:
1) which variables to unstack. It looks like you want SystemWeight, JumpHeight, ...
2) which (one) variable says where to put the unstacked values. It looks like you want Phase.
3) which rrows go together. often this is just "the remaining variable". It looks like you want Name.
>> Name = ["A";"A";"A";"B";"B";"B"];
>> Phase = ["one";"two";"three";"one";"two";"three"];
>> SystemWeight = rand(6,1);
>> JumpHeight = rand(6,1);
>> T = table(Name,Phase,SystemWeight,JumpHeight)
T =
6×4 table
Name Phase SystemWeight JumpHeight
____ _______ ____________ __________
"A" "one" 0.69483 0.76552
"A" "two" 0.3171 0.7952
"A" "three" 0.95022 0.18687
"B" "one" 0.034446 0.48976
"B" "two" 0.43874 0.44559
"B" "three" 0.38156 0.64631
>> unstack(T,["SystemWeight" "JumpHeight"],"Phase","GroupingVariables","Name")
ans =
2×7 table
Name SystemWeight_one SystemWeight_three SystemWeight_two JumpHeight_one JumpHeight_three JumpHeight_two
____ ________________ __________________ ________________ ______________ ________________ ______________
"A" 0.69483 0.95022 0.3171 0.76552 0.18687 0.7952
"B" 0.034446 0.38156 0.43874 0.48976 0.64631 0.44559

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