add element in table

  ff(:,1)

ans =

  table

    Name
    ____

    TEST
 %%*****************************************
    d1(:,1)
ans =

  table

      Name  
    ________

    "TEST_1"
    
    
ff(end+1,:)=d1
Error using  () 
Unable to perform assignment for table variable 'Name' because its size on the left side is 1-by-4 and the size
of the corresponding variable on the right side is 1-by-1.
 
i don't understand this error...size name in ff and d1 is the same
    
K>> size(ff(:,1))

ans =

     1     1

K>> size(d1(:,1))

ans =

     1     1
     

Answer 1

[Voss]

% load stuff from the mat files:
d1 = load('matlab_d1.mat','d1').d1;
ff = load('matlab_ff.mat','ff').ff;

d1

d1 = 1x42 table
      Name      Dwmy    LS_abilitaLong    LS_abilitaShort    LS_long    LS_short    LS_th    LS_minTrades    LS_avgEquity    Avg_abilitaFilter    Avg_mode    Avg_period    Avg_th    Avg_minTrades    Dev_enable    Dev_enableTestDN    Dev_enableTestUP    Dev_devNumDn    Dev_devNumUp    Dev_periods    Peak_enable    Peak_period    Peak_minTrades    Rank_enable    Rank_period    Rank_mode    Rank_type    Rank_minTrades    Rank_maxCat    Rank_using_type    Rank_using_timeframe    Rank_normalize_by_cashvola    Backtest    Cormode    CorTH    BackAdvanc_tradeLMT    BackAdvanc_shiftC    BackAdvanc_cloops    Degrade_enable    Degrade_initialDeg    Degrade_degressMode    MaxPercPortfolio_Disable
    ________    ____    ______________    _______________    _______    ________    _____    ____________    ____________    _________________    ________    __________    ______    _____________    __________    ________________    ________________    ____________    ____________    ___________    ___________    ___________    ______________    ___________    ___________    _________    _________    ______________    ___________    _______________    ____________________    __________________________    ________    _______    _____    ___________________    _________________    _________________    ______________    __________________    ___________________    ________________________

    "TEST_1"     31         false              false            9          2          0           16              0                  0               1            4           40           16              0                1                   0                 1               1              150             0              0               12               0              6             1            1              16               3                1                    1                          0                    1           1       0.75            0.375                 0.75                   2                  0                  100                     0                        0            

ff

ff = 1x42 table
    Name    Dwmy    LS_abilitaLong    LS_abilitaShort    LS_long    LS_short    LS_th    LS_minTrades    LS_avgEquity    Avg_abilitaFilter    Avg_mode    Avg_period    Avg_th    Avg_minTrades    Dev_enable    Dev_enableTestDN    Dev_enableTestUP    Dev_devNumDn    Dev_devNumUp    Dev_periods    Peak_enable    Peak_period    Peak_minTrades    Rank_enable    Rank_period    Rank_mode    Rank_type    Rank_minTrades    Rank_maxCat    Rank_using_type    Rank_using_timeframe    Rank_normalize_by_cashvola    Backtest    Cormode    CorTH    BackAdvanc_tradeLMT    BackAdvanc_shiftC    BackAdvanc_cloops    Degrade_enable    Degrade_initialDeg    Degrade_degressMode    MaxPercPortfolio_Disable
    ____    ____    ______________    _______________    _______    ________    _____    ____________    ____________    _________________    ________    __________    ______    _____________    __________    ________________    ________________    ____________    ____________    ___________    ___________    ___________    ______________    ___________    ___________    _________    _________    ______________    ___________    _______________    ____________________    __________________________    ________    _______    _____    ___________________    _________________    _________________    ______________    __________________    ___________________    ________________________

    TEST     31         false              false            9          2          0           16              0                  0               1            4           40           16              0                1                   0                 1               1              150             0              0               12               0              6             1            1              16               3                1                    1                          0                    1           1       0.75            0.375                 0.75                   2                  0                  100                     0                        0            

Name in table d1 is a string array:

class(d1.Name)

ans = 'string'

But Name in table ff is a character array:

class(ff.Name)

ans = 'char'

To combine them they've got to be the same type, so you've got to convert one or both to something else. Easiest is probably making ff.Name into a string:

ff.Name = string(ff.Name)

ff = 1x42 table
     Name     Dwmy    LS_abilitaLong    LS_abilitaShort    LS_long    LS_short    LS_th    LS_minTrades    LS_avgEquity    Avg_abilitaFilter    Avg_mode    Avg_period    Avg_th    Avg_minTrades    Dev_enable    Dev_enableTestDN    Dev_enableTestUP    Dev_devNumDn    Dev_devNumUp    Dev_periods    Peak_enable    Peak_period    Peak_minTrades    Rank_enable    Rank_period    Rank_mode    Rank_type    Rank_minTrades    Rank_maxCat    Rank_using_type    Rank_using_timeframe    Rank_normalize_by_cashvola    Backtest    Cormode    CorTH    BackAdvanc_tradeLMT    BackAdvanc_shiftC    BackAdvanc_cloops    Degrade_enable    Degrade_initialDeg    Degrade_degressMode    MaxPercPortfolio_Disable
    ______    ____    ______________    _______________    _______    ________    _____    ____________    ____________    _________________    ________    __________    ______    _____________    __________    ________________    ________________    ____________    ____________    ___________    ___________    ___________    ______________    ___________    ___________    _________    _________    ______________    ___________    _______________    ____________________    __________________________    ________    _______    _____    ___________________    _________________    _________________    ______________    __________________    ___________________    ________________________

    "TEST"     31         false              false            9          2          0           16              0                  0               1            4           40           16              0                1                   0                 1               1              150             0              0               12               0              6             1            1              16               3                1                    1                          0                    1           1       0.75            0.375                 0.75                   2                  0                  100                     0                        0            

Then the operation works:

ff(end+1,:) = d1

ff = 2x42 table
      Name      Dwmy    LS_abilitaLong    LS_abilitaShort    LS_long    LS_short    LS_th    LS_minTrades    LS_avgEquity    Avg_abilitaFilter    Avg_mode    Avg_period    Avg_th    Avg_minTrades    Dev_enable    Dev_enableTestDN    Dev_enableTestUP    Dev_devNumDn    Dev_devNumUp    Dev_periods    Peak_enable    Peak_period    Peak_minTrades    Rank_enable    Rank_period    Rank_mode    Rank_type    Rank_minTrades    Rank_maxCat    Rank_using_type    Rank_using_timeframe    Rank_normalize_by_cashvola    Backtest    Cormode    CorTH    BackAdvanc_tradeLMT    BackAdvanc_shiftC    BackAdvanc_cloops    Degrade_enable    Degrade_initialDeg    Degrade_degressMode    MaxPercPortfolio_Disable
    ________    ____    ______________    _______________    _______    ________    _____    ____________    ____________    _________________    ________    __________    ______    _____________    __________    ________________    ________________    ____________    ____________    ___________    ___________    ___________    ______________    ___________    ___________    _________    _________    ______________    ___________    _______________    ____________________    __________________________    ________    _______    _____    ___________________    _________________    _________________    ______________    __________________    ___________________    ________________________

    "TEST"       31         false              false            9          2          0           16              0                  0               1            4           40           16              0                1                   0                 1               1              150             0              0               12               0              6             1            1              16               3                1                    1                          0                    1           1       0.75            0.375                 0.75                   2                  0                  100                     0                        0            
    "TEST_1"     31         false              false            9          2          0           16              0                  0               1            4           40           16              0                1                   0                 1               1              150             0              0               12               0              6             1            1              16               3                1                    1                          0                    1           1       0.75            0.375                 0.75                   2                  0                  100                     0                        0            

Answer 2

[Fangjun Jiang]

You should check size(ff(end,:)). I assume it has 4 columns.