Stamps(7,7) Error using lscov

[keepfighting666]

Has anyone encountered a similar issue? Do you have any suggestions for resolving this problem? I need your help. Thanks a lot.

[Curiositycsc1]

@keepfighting666 Hello, could you please tell me if you have solved the related issue? I also encountered the same problem while dealing with SBAS.

[faraksoch1881]

I ran to same problem @keepfighting666 , were you able to solve this issue?

Error using lscov (line 134)
V must be symmetric.

Error in ps_calc_scla (line 268)
m=lscov(G,[uw.ph_uw(:,unwrap_ifg_index)-ph_scla(:,unwrap_ifg_index)]',ifg_vcm(unwrap_ifg_index,unwrap_ifg_index));
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error in stamps (line 526)
ps_calc_scla(0,1) % single master

[yuluenter]

You can try using an older version of MATLAB, such as R2019.

[faraksoch1881]

@yuluenter Thank you. Your adviced fixed the issue. Originally I ran code in R2024b and later i uninstalled and installed R2019b and it wroked. what could be the reason?It will be a tedius to switch between R2019b and R2024b both and R2019b only for StaMPS. is there any fix so that it will work in new MATLAB version also.

only issue is when i try to plot velocity map by subtracting atmospheric correction which give error as

ps_plot('V-a','a_linear')
Could not check if this is Envisat
SB_INVERT_APS: Starting
638462 ref PS selected
Unable to perform assignment because the size of the left side is 638462-by-32 and the size of the right side is 789814-by-32.

Error in sb_invert_aps (line 80)
aps_corr(:,nzc_ix)=lscov(G2,double(aps_corr_sb'))';

Error in ps_plot (line 565)
sb_invert_aps(aps_flag);

but i think it is flexible as it was no issue in R2024b. Let me know if this is version issue that works with R2024 and not with 2019 or just the processing error? Thank you again.

[wenxuanm42-ctrl]

@faraksoch1881 I have used the MATLAB R2019b，but have the following Warning . I don't know whether this warning and error will cause problems in subsequent processing. Could you give some suggestions?
PS_CALC_SCLA: 11 ifgs used in estimation:
PS_CALC_SCLA: 15-Jan-2023 to 27-Jan-2023 12 days -137 m
PS_CALC_SCLA: 27-Jan-2023 to 08-Feb-2023 12 days 208 m
PS_CALC_SCLA: 08-Feb-2023 to 20-Feb-2023 12 days -57 m
PS_CALC_SCLA: 20-Feb-2023 to 04-Mar-2023 12 days -169 m
PS_CALC_SCLA: 04-Mar-2023 to 16-Mar-2023 12 days 256 m
PS_CALC_SCLA: 16-Mar-2023 to 28-Mar-2023 12 days -196 m
PS_CALC_SCLA: 28-Mar-2023 to 09-Apr-2023 12 days -43 m
PS_CALC_SCLA: 09-Apr-2023 to 21-Apr-2023 12 days 195 m
PS_CALC_SCLA: 21-Apr-2023 to 03-May-2023 12 days -141 m
PS_CALC_SCLA: 03-May-2023 to 15-May-2023 12 days -122 m
PS_CALC_SCLA: 15-May-2023 to 27-May-2023 12 days 92 m
Warning: A is rank deficient to within machine precision.

In lscov (line 207)
In ps_calc_scla (line 242)
In stamps (line 521)
PS_CALC_SCLA: Finished
STAMPS: Finished